I have a Sig Extra 300xs on the way. I wanted to know if anyone out there mounted a O.S. 1.60 fx on one of these things. I just want to know how it turned out balance wise and how it flies. I plan on installing the 1.60 with a Slimline exhaust and a Perry Vp-30 pump. I have this set up in a few planes and love it. It pulled a World Models Extra 300 at 14.5 pounds around no problem. So this Sig Extra should rock!