I cut out t' centerin' rings and glued up t' BT-5 tube arrays as shown here.

I found a scrap piece o' steel tube that I sharpened with a grinder, ya bilge rat, and punched out t' BT-5 holes. Begad! Ya scallywag! Later they would be sanded with sand paper glued around a dowel.

T' outside diameter o' t' Centerin' Rings were cut with scissors and stack sanded t' size.

I cut nine pieces o' BT-5 t' 4 inches long.

I marked t' BT-5s 1/2" and 1 inch from each end, me bucko, and glued up these "BT-5 arrays" which became t' tube couplers.

I then joined t' main tubes by gluin' them together with t' BT-5 arrays. Aye aye! Use care t' roll t' main tubes on a flat surface t' keep them in alignment.

Most o' t' balsa stock that came in me box-o-parts was small bits, ya bilge rat, matey, old die cut skeletons and miscellaneous bits, matey, me hearties, so I thought that a mixture o' tube fins, balsa and tube tips would make a nice design.

I cut t' top tail rin' with t' patterns in t' pattern section.

I got two pre-cut fins that looked great as lower fins. Avast! Blimey! I attached 4 inch sections o' BT-5 tubin' t' t' fin tips and capped them off with some wood buttons that were rollin' around in t' bottom o' t' box-oparts.

T' top tail rin' is glued flush with t' aft o' t' BT55 usin' t' tube markin' guide included.

Next I glued an 18 inch piece o' BT-50 inside t' top tail rin' and along t' top mark on t' aft most BT-55

Attach two 6 inch BT-20 sections at t' junction o' t' lower fin/ body tube junction, flush with t' aft tube. Well, blow me down! I capped them with some larger wooden caps from t' ole-box-o-parts.

I glued up a 24mm engine mount for t' main, me hearties, central tube. Arrr! Blimey! I cut a BT-50 section, me bucko, 2 3/4 inches long, me bucko, and glued a 20-50 Centerin' rin' flush in one end as an engine block.

I had a pair o' 50-55 centerin' rings that completed t' engine mount. Ya scallywag! Avast! One centerin' rin' is glued flush with t' engine block end, matey, and t' second is 1/2 inch from t' aft end.

T' 24mm engine mount was glued into t' main tube, me hearties, me bucko, ya bilge rat, with t' aft rin' flush t' t' end o' t' tube.

I found some more pre cut fins, ya bilge rat, and attache them at t' junction o' t' top tail rin' and t' main BT-55.

I made up an 18mm engine mount for t' upper BT50 tube. Well, arrr, blow me down! I cut a 2 3/4 inch piece o' BT-20 and glued a BT-20 engine block flush into t' front end. Aye aye! I salvaged this long 20-50 centerin' rin' tube from a Estes Athena that be in me box. Aye aye! I also used t' Athena nose cone on t' front o' t' upper tube.

Next I glued t' 18 mm engine mount into t' upper BT-50, ya bilge rat, leavin' 1/2 inch hangin' out.

I glued 3 inch sections o' BT-20 onto t' tips o' t' upper fins for more stability.

I found a smaller version o' t' two precut upper fins that I used as t' top fin. I glued it on t' center line, flush with t' aft o' t' top tail rin' cut-out.

Next I cut two 2 1/4 inch sections o' BT-5. Ya scallywag! Blimey! Avast! Blimey! I cut t' aft o' t' tubes at a similar angle as t' upper tail rin' and glued them against t' top fin. I then inserted two .650 diameter wooden beads and 1/8 inch dowels as laser guns.

I did get a pingpong ball in me box-o-parts, and I HAD t' use it. Arrr! Blimey! Blimey! I cut it t' fit on t' BT-50 and created a cannon pod. Arrr! Blimey! It is glued 11 inches from t' aft o' t' main tube.

I wanted a canopy on t' nose cone. Begad! I found this triangular chunk o' balsa in t' box.

I made some angled cuts and sanded t' underside t' t' approximate radius or t' nose cone.

I attached t' canopy t' t' nose cone and two 1/8 inch x .680 long "guns" on 1/8 x 1/4 inch balsa cannon mounts.