Bubba Bill,

I have the instructions for the FSI Dart and the Mach 1 Systems Thruster. Don't recall how I got them as I never had the model. I will scan them and post them later. Essentially, the Thruster is just a F100-0 motor that has fins and two launch lugs on it. They rounded the forward section of the booster - I am guessing they just ground it - so that it tapers toward the Dart ad its D20-12 motor. FSI catalog lists F100 dimensions as 27mm x 150mm.
I have to scan to a memory card on one computer and transfer it to the better computer.

Chas

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Charles Russell, MSgt,USAF (ret.)
NAR 9790, Lvl 1
SAM "Balls Three"