Brief:
I changed t' motor mount (MMT) t' a 38mm from stock 29mm and used a GROOVE-LOK from Giant Leap Rocketry t' anchor fins t' t' MMT. Well, shiver me timbers, blow me down! I used 0.187 plywood bulkheads and centerin' rings throughout. Ya scallywag! Arrr! I added an electronics/payload bay t' t' sustainer section. Blimey! Well, blow me down! Changed out t' chute for a larger one and added a Aero Pac Quick-Change motor retainer.

Modifications:
I had t' reduce t' tang on t' stock plastic fins in order t' accommodate t' larger MMT and t' GROOVE-LOK. Begad! Ahoy! I used a power miter saw t' cut them slightly larger than needed, me bucko, me hearties, me bucko, then fit them with a file. Well, blow me down! Arrr! Care must be used nay t' let t' plastic piece get too hot and start t' melt - just take a bit at a time. Ya scallywag! Ya scallywag! I bought a 6" GROOVE-LOK but cut it t' fit betwixt t' two aft centerin' rings that encased t' fin tangs (picture). T' fins were 6-filleted with 30-minute epoxy.

I replaced t' stock 42" chute with a 50" one due t' t' increased weight o' t' mods and I used a Nomex piece in lieu o' t' baffle that was sent t' use with t' stock MMT.

Construction:
T' MMT is a phenolic 38mm x 18" tube from Giant Leap t' replace t' paper 29mm factory unit. Main coupler was replaced with a phenolic one from Giant Leap and epoxied t' t' booster rather than t' sustainer t' better protect t' booster lip on ejection. T' e-bay was scratch built from a phenolic coupler and plywood bulkheads; t' sled slides on 8-32 all-thread and is made from 1/8" balsa plywood and two pieces o' aluminum 3/16" square tubing.

I used t' GROOVE-LOK so that once I set one o' t' fins in place, arrr, ya bilge rat, t' alignment o' t' others was a snap, ya bilge rat, plus t' individual groove rails gives t' fin a nice sturdy mount t' complement/strengthen t' expoxy fillet. Avast, me proud beauty! T' exterior fin root bulges in t' middle makin' t' filletin' process a bit more difficult t' make it look good, matey, but I had it down by t' third fillet.

T' overall kit went together easily and t' instructions were clear. Avast! I filled t' airframe tube spirals with Elmers wood filler and acheived a decently smooth exterior with one application and sanding. Begad! Aye aye! I did nay use t' included decals, ya bilge rat, but rather made me own. Avast! Well, blow me down! T' finish was gloss white. Looked really nice sittin' on t' launch pad.

Flight:
T' stock kit called for G motors, me bucko, but goin' from t' 32 oz. stock dry weight t' t' final 56 oz. Aye aye! Blimey! called for typically a bit more power. Blimey! Blimey! Aye aye! Blimey! I bought a G38, a G40 and a G77 with t' kit before I decided t' modifiy it. T' G38 and G40 RockSim'd (I have a revised .rkt file I will email) out as a crash and a 25' recovery, arrr, matey, arrr, whereas it said that t' G77 should put it t' 400'+, ya bilge rat, which is what happened.

T' first flight was on t' G77-4 and it flew perfectly straight with t' motor ejection occurin' right at apogee and no roll t' speak of. Aye aye! T' bottom o' t' booster tube sits about a 1/2" below t' bottom o' t' fins, arrr, me bucko, so on a perfectly still day like we had, me hearties, me hearties, me bucko, t' rocket comes down on t' tube. Avast, arrr, me proud beauty! It crinkled just a bit on one edge. Avast, ya bilge rat, me proud beauty! I saw in an earlier article that someone had reinforced that area with a piece o' coupler tube. Ya scallywag! Avast! I intended t' do so but forgot - wished I had, but I will reinforce it somehow in t' future before it flys again.

So, since I was succesful on t' test flight with t' G77, me bucko, I decided t' put a small H motor in it and do me Level 1 Tripoli certification flight. Begad! Blimey! I put an H128 but t' motor reload kit had t' medium, or 10 second delay. Begad! rockSim said I needed a 6-7 second delay, so I drilled out a bit o' t' delay durin' assembly. T' H128 worked as sim'd and went about 850' with t' ejection once again right at t' top o' a very straight, no-roll flight. Level 1 accomplished! T' booster hit on t' hard-pack desert road and worstened t' crinkle, matey, so I definitely need t' add somethin' thar or go t' me 58" chute, or both.

Summary:
Great flyer as everyone else said and t' stock components were very nice as far as quality, I just wanted somethin' a bit stronger in t' bottom since I want t' see about it goin' t' 5K', matey, which I will try next time out.