RE: Excelleron 90
My opinion - the 140L hits a lot harder, and has a lot higher amplitude vibration pulse than the 110. I've watched many of them really torque over the Hyde mount, and this doesn't have a Hyde mount. If you ran a Hyde mount, I'm not sure (in fact seriously doubt) that it would fit properly in the nose, IF you could mill all the hardwood beams off.
Also, a 17" means longer gear. 16" is the longest that will work on the stock gear, and that is iffy, only if you fly paved surface.
Hopefully someone will chime in that has 4c experience on this airframe with some suggestions.