Brief:
For this 2-stager, matey, an Estes Mini Marz Lander serves as both t' nosecone and second stage. Well, blow me down! T' main rocket has a 29mm motor mount, while t' Lander flies on 13mm motors. Begad! 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. Aye aye! Begad! T' booster includes a 29mm motor mount, fins made from copper-clad G10 circuit boards, arrr, and Blacksky rail buttons.
• One additional 2" x 44" mailin' tube, shiver me timbers, shiver me timbers, with full-length telescopin' tube (bought from T' Container Store).
• One 2" x 8" clear plastic mailin' tube, ya bilge rat, with plastic end caps (also from T' Container Store)
• 12" o' 24 ga wire, shiver me timbers, arrr, screw terminal connector, G10 plate, ya bilge rat, arrr, G-Wiz altimeter
• Two plywood bulkplates (1/4")
• One eye bolt with related hardware.
• Misc. Ahoy! 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. Avast, me proud beauty! However, matey, I just couldn't brin' myself t' cut it up and remove its legs. Avast, me proud beauty! Avast! Instead, I decided t' use it as a nosecone as-is, and t' try t' stage it from t' booster rocket. 

Rummagin' around me "bone yard", I found t' remains o' a 2" diameter rocket that had a 29mm motor mount. Blimey! Aye aye! A bit much for what I needed, arrr, matey, but it be t' right diameter (2"). Begad! Ya scallywag! I needed some more tubin' and a way t' mount me G-Wiz altimeter. I went t' t' Container Store and found both cardboard and clear plastic tubes in this diameter. Ya scallywag! 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), shiver me timbers, and made a payload section out o' another 7 inches (the red section above that). I made a shoulder usin' a piece o' t' telescopin' tubing, a home made plywood bulkhead, 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. Begad! Blimey! T' fit was tight, ya bilge rat, and t' make sure it wouldn't come apart, I attached it with four small screws. Avast, me proud beauty! Blimey! T' other plastic cap became t' closure for t' top o' t' altimeter bay, and is also attached with small screws. Avast, me proud beauty! Blimey! A plywood bulkhead was bolted t' it, arrr, and t' pair be drilled t' accept t' wirin' for t' altimeter. Ahoy! Blimey! Well, blow me down! Blimey! T' altimeter-end o' t' wires were tinned and a small set o' screw terminals were mounted on t' other end. Aye aye! Blimey! This bulkhead was 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, me hearties, shiver me timbers, just beneath t' Lander). Ahoy! Blimey! This was notched t' match t' Lander's legs and launch lugs. Aye aye! A small piece o' t' telescopin' tubin' was glued in, me bucko, and this assembly slid into t' fixed portion o' t' adapter. Arrr! This be meant t' be smartly removable t' facilitate wirin' t' Lander's igniter.

Flight:
To prep t' altimeter, 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 was inserted and t' upper cap be secured with 2 screws. T' igniter was inserted into t' Lander's motor and secured with maskin' tape. Begad! T' igniter leads were attached t' t' screw terminals, and continuity was visually confirmed at t' G-Wiz. Avast! T' lander used Estes waddin' and t' booster used a Giant Leap Keelhaul®©™ pad.

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

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