Just built a detonator using 2" PVC as most do but we were able to put pressure caps at the end and drill holes in them to allow air through. A buddy of mine had some rechargeable speakers from of all places a Cingular phone store and I loaded the TK threads off the 501st to a thin Mp3 player. Ipod Nano is pefect. They both fit in the detonator very well and play for about 2 hours on shuffle. The control plate is coming from some scraps that are left over from my AM armor and some washers and filler. Using normal clips I have used on all my builds from Tandy Leather and some heat shrink tubing on the ends so they don't scratch. Clearly not going to be close to EIB I am doing this for fun and hope the kids dig the sounds. Will post pics and maybe some vid of it in action. One more note if I may all this new is easily less than $100.
Totally understand on the shorter troopers my armor is perfect being tall but AM seems like it would kill you at 5'6" as stated.