Greg, This is something totally different than what FX uses.
I finally had time to build a very rough prototype today and tested on my wifes .177 Marauder. I just switched pellets and without tuning for the new 10.5gr pellets was getting 50 shots at 905fps avg. By simply adding an ssg, I got 90 shots at 909fps. My ES did climb from 16 to 31fps, but my prototype is crude to say the least. I am very confident that with a little work my finished SSG will work even smoother and reduce my ES back down to 20 or less. Bob Sterne the GTA member responsible for bringing this to light needs alot of credit and praise for his continual efforts in the airgunning world. Bob is the real deal and because of his work and the efforts of guys like motorhead(Scott) and Travis from WAR, this SSG is proving to be a huge gain for tuners and hobbyists alike!!