RE: MAC 28, Sithl FS 56 or Weed eater feather light
I like the Mac 28. I have modded mine by filing the top of
the piston to increase the bypass timing, and filed the exhaust
raised the compression by taking out the gasket. I am running
on board glow with 5% cool power green and E-85 and getting
just over 8000 rpm with an 18\6 APC. Flying a CAP 232 with it.
Low vibration. Also, put in a Bowman ring.
Jack