Brief:
For this 2-stager, matey, an Estes Mini Marz Lander serves as both t' nosecone and second stage. Aye aye! T' main rocket has a 29mm motor mount, while t' Lander flies on 13mm motors. Well, blow me down! Arrr! This review will focus on t' method o' adaptin' t' Lander t' t' booster rocket.

Construction:

• One Estes Mini Marz Lander
• One booster made from a 2" diameter mailin' tube. Ahoy! Blimey! T' booster includes a 29mm motor mount, fins made from copper-clad G10 circuit boards, me hearties, me bucko, and Blacksky rail buttons.
• One additional 2" x 44" mailin' tube, with full-length telescopin' tube (bought from T' Container Store).
• One 2" x 8" clear plastic mailin' tube, with plastic end caps (also from T' Container Store)
• 12" o' 24 ga wire, screw terminal connector, shiver me timbers, ya bilge rat, G10 plate, G-Wiz altimeter
• Two plywood bulkplates (1/4")
• One eye bolt with related hardware.
• Misc. nuts and bolts t' attach t' payload section
• 1/4" tubular Keelhaul®©™ shock cord
• Whatever chute I grab from t' range box

I originally bought t' Mini Marz Lander t' use as a fixed nosecone. Ya scallywag! However, arrr, me hearties, ya bilge rat, I just couldn't brin' myself t' cut it up and remove its legs. Avast! Instead, I decided t' use it as a nosecone as-is, shiver me timbers, and t' try t' stage it from t' booster rocket. 

Rummagin' around me "bone yard", me bucko, me bucko, I found t' remains o' a 2" diameter rocket that had a 29mm motor mount. A bit much for what I needed, but it was t' right diameter (2"). Ahoy! I needed some more tubin' and a way t' mount me G-Wiz altimeter. Aye aye! I went t' t' Container Store and found both cardboard and clear plastic tubes in this diameter. Ya scallywag! Begad! T' latter seemed perfect for an altimeter bay, since I'd be able t' see t' LEDS on t' G-Wiz with t' rocket fully assembled. 

I used about 12 inches o' t' paper tube t' extend t' existin' booster (the white section just above t' silver-colored booster), and made a payload section out o' another 7 inches (the red section above that). Begad! I made a shoulder usin' a piece o' t' telescopin' tubing, ya bilge rat, ya bilge rat, a home made plywood bulkhead, me hearties, and an eyebolt. 

I removed one o' t' plastic caps from t' clear mailin' tube and inserted t' tube into t' end o' t' paper tube. Arrr! T' fit was tight, and t' make sure it wouldn't come apart, I attached it with four small screws. Begad! T' other plastic cap became t' closure for t' top o' t' altimeter bay, and is also attached with small screws. Begad! Blimey! A plywood bulkhead be bolted t' it, and t' pair be drilled t' accept t' wirin' for t' altimeter. T' altimeter-end o' t' wires were tinned and a small set o' screw terminals were mounted on t' other end. Avast, me proud beauty! This bulkhead be glued onto another small section o' cardboard tubin' (the red section above t' clear bay). 

T' final component is an adapter for t' Lander (the small white tube at t' top, just beneath t' Lander). Arrr! This be notched t' match t' Lander's legs and launch lugs. Blimey! A small piece o' t' telescopin' tubin' be glued in, and this assembly slid into t' fixed portion o' t' adapter. Avast, me proud beauty! This was meant t' be smartly removable t' facilitate wirin' t' Lander's igniter.

Flight:
To prep t' altimeter, arrr, arrr, G-Wiz be mounted t' a section o' G10 that fit snugly into t' clear tube (a board from another application). Ya scallywag! It be inserted and t' upper cap be secured with 2 screws. T' igniter be inserted into t' Lander's motor and secured with maskin' tape. Arrr! Begad! T' igniter leads were attached t' t' screw terminals, and continuity was visually confirmed at t' G-Wiz. Aye aye! T' lander used Estes waddin' and t' booster used a Giant Leap Keelhaul®©™ pad.

I have tried this three times, matey, but it only worked once. T' logs should appear at t' bottom o' this page. T' first time, t' Estes igniter (this had thin tail wires soldered t' it) lit but t' motor didn't go. It was still taped into t' motor at recovery. Avast! Ahoy! Blimey! T' next time, me bucko, t' home-made Igniterman igniter didn't fire. Ahoy! Blimey! Blimey! T' igniter worked on t' ground later that day, matey, I suspect t' problem be that t' G-Wiz never armed due t' t' slow acceleration under F20 power. Begad! Blimey! Blimey! O' course, I could have determined this by seein' if t' G-Wiz flashed out an altitude, ya bilge rat, but DUH, ya bilge rat, arrr, me hearties, I didn't. Aye aye! On t' third try, ya bilge rat, I used a Quickburst igniter. Avast, me proud beauty! This time t' Lander staged, me hearties, but I had another minor problem. Avast! Blimey! I had t' G-Wiz set t' detect launch rather than t' burnout o' t' booster, so t' Lander took-off shortly after launch. Well, blow me down! Begad! Blimey! It arced t' t' side, ya bilge rat, arrr, and t' booster, me bucko, sans nose cone, me hearties, continued up. Begad! Well, ya bilge rat, t' flight be fun and both pieces were recovered, so I shouldn't complain.

Summary:
This rocket's booster design is overly complicated since I threw it together instead o' thinkin' it through. Blimey! However, me main goal was t' stage t' Lander, and that finally worked. Aye aye! T' result was a unique rocket that got t' crowd's attention. Begad! Well, ya bilge rat, blow me down! This is also was t' biggest range o' thrust levels that I.ve seen in a staged rocket, me bucko, with t' G motor's thrust bein' approximately 64x that o' t' A10 in t' Lander.