out of curiosity, what's the weight difference?

MG,
 
Do you like the run you are getting with your setup? Can you share some details?

I have tried two different engines in an OPP (Other People's Plane) that did not run well at all. I believe much of that is the unfortunate motor mount and tank installation, so am still collecting ideas on when/whether to try the Evil 36's again in something else.

For those with Evofrustration, I would observe that the critical dimensions of the OS 35AX are the same. The only mod I needed to make was to enlarge the glow plug access hole, since the Evil has a rearward slant and the OS does not. And, since it offends you, I further note that the AX has a "coffin-head" instead of a "bump."

Dave