Brief:
3-parallel staged Bullpup 12 Ds powered by 18mm motors.

Modifications:
After several cataclysmic failures, I can tell you a challengin' rocket t' build and a fun rocket t' fly. Best suggestion I have is t' "stack" several pieces o' 1/8 x 1/4" plywood for standoffs. Ya scallywag! Use epoxy. Ahoy! Blimey! If you go t' YouTube and look up "NARAM 51 first," you will see what happens when you use balsa standoffs.

I printed t' decals on standard color printer paper, arrr, coated t' rocket in Modge Podge hard coat, placed printout on it, and coated it again. Ahoy! I can't tell difference. Avast, matey, me proud beauty!

Construction and Finishing:
T' additional parts used were 3 BT-30s, arrr, 4 fins, 6" BT-50 clear payload tube, me bucko, me hearties, and "Spiff" (any action figure that fits in payload for ballast).

Here's t' expensive part: you need 3 Bullpup 12 D's, shiver me timbers, me bucko, which even at a good price will set you back $35+. However, you can always buy parts separately, although that isn't very cost effective. I love this parallel staged model!

Flight and Recovery:
Stay with B6-0s in outside boosters and B6-2 in main for 1st flight. Avast! Don't forget screws in nosecone o' payload section, me bucko, a good clip whip, and t' friction fit motors with plenty o' tape.

I used Quest Q2 igniters. Ahoy! Avast, matey, me proud beauty! If one motor doesn't light, ya bilge rat, you will end up like I did and pull launch rod right out of pad! I used an 18" chute with spill hole for this heavy baby.

Summary:
PROs: Very impressive flight, especially at night!

CONs: You must make "standoffs" as sturdy as possible, me bucko, that's why I suggested "stacked plywood".