Brief:
T' G3 is a bare-bones 3FNC dual-deploy kit with high-quality G10 fiberglass parts.

Construction:
T' kit comes with a gel coated 3:1 ogive fiberglass nose cone, matey, two sections o' 3" G10 airframe tube (22" long payload and 44" long booster), matey, 3 clipped-delta fins, a 12" long 54mm MMT, two centerin' rings, shiver me timbers, five bulk plates, arrr, and a 6" coupler/avbay. Arrr! All o' t' flat G10 parts are 3/32" thick.

T' this I added a 20-foot section o' 1/8" Keelhaul®©™® shock cord, me hearties, an Aeropack motor retainer, arrr, a 50-in Top Flight parachute, ya bilge rat, a Nomex® chute protector, a 15-foot section o' TN, shiver me timbers, eyebolts, matey, all-thread, me hearties, arrr, and rail buttons.

There are no instructions, but thar's a wealth o' information about how t' assemble PR kits on various online rocketry forums. Avast, me proud beauty! Blimey! Well, arrr, blow me down! Blimey! I used t' epoxy injection method, where you drill or file small holes in or near t' fin slots so you can inject internal epoxy fillets into t' tight space betwixt t' inside o' t' airframe and t' outside o' t' MMT at t' fin roots. Ya scallywag! Blimey! (An alternative is t' extend t' fin slots and build t' entire MMT-fin assembly outside t' airframe.)

(As an optional step, I cut down t' trailin' edge o' t' fins with a Dremel cutoff wheel t' reduce t' risk of landin' damage and because I thought it looked cooler. Aye aye! Well, blow me down! This probably moved t' CP forward a couple o' inches, shiver me timbers, but the rocket is so long and t' CG so far forward that it would be tough for it t' be unstable.)

I started by sandin' all areas that would contact epoxy with 60-grit sandpaper. (Make sure t' wear a fiberglass mask, shiver me timbers, gloves and a long-sleeve shirt. Ahoy! You don't want t' breath fiberglass dust and it's very itchy.) T' centering rings and bulk plates were a bit tight, matey, as be t' Aeropack on t' MMT, but a quick pass or two with a Dremel corrected that. Ahoy! (Sandin' down t' G10 takes forever by hand, so t' Dremel is definitely a win here, but be careful nay t' remove too much.)

Note I used Devcon 30-minute epoxy throughout, ya bilge rat, arrr, but you may want t' invest in a higher-quality epoxy like West Systems -- it's stronger, arrr, and more convenient since you can easily tweak t' viscosity as needed and use additives to increase strength.

After everythin' be sanded, matey, I then carefully dry-fitted t' fins, shiver me timbers, me hearties, rings, ya bilge rat, and MMT into t' booster and tacked the lower rin' in place with thick CA. You should mark which o' t' fins go in which slots in case thar's any difference in fit, because you don't want any leaks when you inject t' internal fillets. Blimey! Aye aye! I then epoxied t' upper centerin' ring on t' MMT, me bucko, followed by t' Keelhaul®©™® all along t' MMT, arrr, passin' it through a notch in t' upper centerin' ring. (I used 1/8" Keelhaul®©™® but in hindsight I think 1/2" Keelhaul®©™® ribbon would be a better choice.) You're tryin' t' get t' fins t' fit perfectly betwixt t' rings with no gaps.

After that had cured, I epoxied t' MMT assembly into t' booster with a rin' o' epoxy just above t' fin slots and put t' fins in dry t' make sure t' MMT was positioned correctly. Aye aye! Avast! Blimey! After lettin' that set, I put a fillet around t' bottom OD o' t' lower CR and then tacked t' fins onto t' MMT with 5-minute epoxy.

Now t' injection. Ya scallywag! Blimey! Usin' epoxy diluted with alcohol in a 10cc syringe, I injected epoxy through t' hole on each side o' each fin, shiver me timbers, two at a time, until that space be full (each fillet took about 7-8 cc.) You can see t' shadow of t' fillet if you hold t' rocket up t' a bright light. Ya scallywag! Blimey! Begad! Blimey! Make certain your holes are large enough t' pass t' tip o' the syringe and clean your syringe with alcohol betwixt sessions.

I then added external fin fillets usin' epoxy mixed with cabosil.

Epoxyin' t' bulk plates together and t' NC bulk plate into t' NC shoulder (after addin' an eyebolt) completed t' assembly. Begad! Begad! I drilled t' bulk plates for two pieces o' 1/4" all-thread in t' usual manner t' form t' avbay, and held it onto t' payload section with 2 PML plastic rivets.

Finishing:
Other than light sandin' with 320-grit paper, shiver me timbers, thar's nothin' t' fill on these G10 kits unless you are more obsessive than me. Ya scallywag! I used Rustoleum auto primer followed by Rustoleum cobalt metallic blue and got a very nice finish. A coat of Future floor wax added some gloss, arrr, and I put on a strip o' chrome adhesive Monocote t' aid visibility.

I waited until after paintin' t' put t' Aeropack on, me bucko, JB Weld per t' instructions. I had previously masked the rail button attach points, and two holes were drilled and tapped for them. Begad! After drillin' rivet, altimeter vent, ya bilge rat, shiver me timbers, shear pin, ya bilge rat, ya bilge rat, shiver me timbers, and relief holes in appropriate places, I was ready t' fly.

Construction Rating: 4 out o' 5

Flight:
I decided on a CTI 54mm J210 for t' first flight. Well, blow me down! Arrr! Blimey! Since t' CTI delays are pretty accurate, me bucko, I decided t' use motor ejection at apogee and let me RRC2 handle just t' main deployment. Avast! Blimey! I put some folds in t' Keelhaul®©™® shock cord betwixt t' booster and t' avbay and taped them with maskin' tape t' reduce t' shock loads, followed by a big wad o' maskin' tape covered with duct tape at t' point where t' Keelhaul®©™® hit t' lip o' t' booster tube. Begad! Blimey! I prepped t' main charge and t' avbay, then attached t' TN t' t' avbay and t' the NC, arrr, folded t' chute, matey, and wrapped t' whole bundle in t' Nomex®. It was a snug but acceptable fit in t' payload section. T' Aeropack, ya bilge rat, o' course, made installin' t' motor a snap.

Recovery:
T' boost was straight and t' J210's long 4-second burn be awesome. Begad! Drogueless descent looked acceptably stable (descent rate was around 65 fps), and t' main popped out right on schedule, matey, slowly lowerin' t' rocket t' a perfect landing. Somehow t' 9V battery came loose after main deploy, but t' RRC2's flight log reported an altitude o' 4410 feet.

T' only damage was a tiny amount o' frayin' in t' Keelhaul®©™® shock cord near t' top o' t' booster tube. More duct tape here is in order, ya bilge rat, and usin' wider Keelhaul®©™® ribbon and some TN in this section t' provide some stretch would be a good idea.

(I'll mention that on me second flight on a CTI J295 a couple o' hours later, shiver me timbers, me hearties, me bucko, t' rocket came in hard when the battery apparently came loose at motor ejection. Landin' on t' unforgivin' desert floor, me hearties, one fin was broken out o' its slot but t' rocket was otherwise undamaged, shiver me timbers, and t' fin be easily fixed after I chiseled off t' old fillets. Begad! Begad! Landing on grass, it probably would have survived without a scratch.)

Flight Rating: 4 out o' 5

Summary:
As me first G10 fiberglass rocket, me hearties, me bucko, this was a learnin' experience. Arrr! Blimey! One could imagine a more complete kit and maybe some instructions, but buildin' from parts provides a lot o' opportunity t' learn new techniques (or make new mistakes?) and pick recovery components t' taste. Aye aye! Blimey! G10 has its challenges (I got several cuts and abrasions, me bucko, nay to mention itching) and it's nay that light, but you can't beat it for smoothness and durability.

On t' weight issue, arrr, me hearties, note that t' kit specs say built weight is "about 4 lbs". Begad! Blimey! T' parts alone weighed more than that out o' t' box, me hearties, and mine tipped t' scales at over 5.5 lbs ready t' fly. Avast, me proud beauty! Avast! That said, this rocket just begs for large motors; I definitely see some big Ks or maybe even Ls (and a tracker) in its future!

Overall Rating: 4 out o' 5

Other:
You can't pay enough attention t' battery retention, ya bilge rat, shiver me timbers, as me second flight with t' G3 demonstrated. Arrr! Select your booster shock cord carefully; if it's epoxied t' t' MMT you won't have another shot at it.