I have the .45 Evo on my Xtra Easy 2. You should remove the weighted flywheel when going to a 2 bladed prop. The replacement is cheap. I have a Dubro 2 bladed spinner that has fitting problems with the back plate and it doesn't leave enough threads for the prop nut.

My XE2 is a completely different plane now. I'm currently using an APC 11x7 and did fly it with a same sized Zinger. It will fly out of sight if I don't back off. Of course, it lands differently now and ground clearance is less than 2 inches. I think my next project is to attach a disposable camera pod on the bottom and try aerial photos with it. The Evo has a lot of power to spare for something like this.