I started building my Hog Bipe in November and finished on Memorial day. Took my time.
I read quite a bit here on rc universe about the subject before I began building and gave consideration to the powerplant and landing gear plate.
I opted for a .91 magnum four stroke cause I couldn't pass up the deal I got and as far as the landing gear plate I cut a piece of scrap ply and glued it perpendicular to the leading edge of the plate so both front and rear edges of the plate are supported and structurally sound. It worked perfect. The rest is pure Hog Bipe.
As far as the .91 goes I am glad I didn't go any smaller.
My plane is covered in 21st century fabric and CG'd without adding any weight anywhere.
I also opted for the dual servo setup for the aelerons and am glad I did.
I read a lot of complaints of the plane having a tendancy to nose over on landing and mine did the first landing as it came to a stop. I simply added a little more elevator movement at the control horn and solved the problem. As I roll to a stop I am at full up elevator and the tail wheel stays on the ground.
Back to the engine. The .91 will get the plane off the ground nice and gently at less than half throttle at a gentle climb rate. And will pull the plane vertical maybe 200 feet before it stalls and hangs there. It's also got enough snort to pull you out of a not-so-good situation i.e. getting away from trees and such as you are learning how slow your hog will fly and still handle well.
All the recommended throw rates seemed good to me except the additional elevator throw I gave it to prevent nose-overs.
I have really enjoyed learning to fly this plane this week. I put a gallon of fuel through it already.
I will post pictures of my plane when my wife gets the prints back.

Otis J