I apolagize, I don't mean to lead anybody on.

For my own entertainment, I am trying to see if I can make a ST90 turn a APC10X10 prop 16,000. While it may not possible or practical, and I may spend three times as much as buying a Jett 90lx, its all in the fun of trying.

The piston modification were to the skirt to uncover the ports when the piston in at BDC. I'll try get pictures of what I have done posted