Brief:
This is a scratchbuilt anti-zipper design with interchangeable MMT/fin assemblies.

Construction:
Main BT with payload and 3 fin design. Aye aye! Well, blow me down! It is anti-zipper and can change from a single motor t' a 3-motor cluster in only a minute! Uses a center rin' t' separate payload from chute compartment. Begad! Aye aye! I needed t' add extra weight in payload for clustered assembly. Uses quick links, arrr, eye bolts, matey, and tubular nylon for strength.

I used plywood for fins with through t' body assembly. Ya scallywag! Avast, me proud beauty! Don't skip on glue--epoxy is better! After first launch just a little black on fins but no damage! Also, shiver me timbers, use nylon chute! Save yourself some aggravation. Begad! I got mine at NARAM 51 from Sunward but any good chute will do. Blimey! Avast, me proud beauty! Biggest trick is t' mount your coupler in main body so can change out fin assemblies. Ahoy! Ya scallywag! Build all fin assemblies with baffles so you don't need wadding.

Flight:
I went for it on first attempt with 3 D12-5s. Ya scallywag! I wouldn't use any less o' delay. Blimey! I had long shock cords! You connect one t' any eyebolt in main body with a quick link, arrr, me hearties, add a piece o' tubular nylon two times longer than rocket, me bucko, me hearties, shiver me timbers, then another quick link (this one gets t' parachute), me bucko, and finally another short piece o' tubular nylon connect t' the eyebolt in your baffled MMT/fin assembly. Make sure you use plenty o' epoxy in motor mounts! You can extend life of insides by sprayin' chute compartment with fire resistant paint used on BBQ grills.

Summary:
Fun rocket t' launch! Use a Clip Whip, as it's t' only way t' go. Biggest pro is quick and easy disconnect of different fin assemblies from 1 motor t' 3 engine cluster. Aye aye! Avast, me proud beauty!

You might want t' make it a little longer than 2 feet t' avoid havin' t' add weight. Well, blow me down! Besides that, thar's nay a thin' wrong with it! Makes life easy if you fly in different fields and a cluster too much for one but great at the other!