W4RCF,

I have nearly the exact set up you describe in my GP Extra. The only differnece is the Glow Plug. I use the OS #8 as recommended w/o problem. One other "issue" with the 91FX is the prop size. I had the overheating problem you describe when using the props initially recommended in the manual. I am currently use a 13x6 APC and all is well.

Kent

P.S. Morgan's Omega does have castor oil.