Thanks for the info. Yes the Kadet has a 80.5" wingspan.

I was looking at the Featherlite engines and they weigh about 51oz or 3.18lbs. My plane with the OS .61 FX already weighs in about 13lbs with the avionics on board, plus I'm adding 2 - 4 lbs in camera equipment. The .61 engine does fine getting the plane off the ground and seems to have plenty of power, but I will be flying at high altitudes, 4,500 - 10,000ft and possibly in high winds. Also the .61 goes through Glow fuel real quick.

With a featherlite engine I would be concerned of the plane being to heavy. Does anyone know how many lbs of lift the Kadet generates?

Also are there any downsides of a Diesel conversion? I have heard they greatly increase fuel efficiency? Is this true?