I'm building one right now. I plan on increasing both the elevator and rudder, and counterbalancing them. I'm sliding the Horizontal stab forward, and the vertical backward to increase rudder throw. Dubro super strength gear for prop clearance (saito 82, 15X4 APC). I've also modified the firewall to hold the 82 at a 9 0 clock position. I'm thinking of mounting the elevator servo in the tail. I've modified the wings for flaps. Tail wheel will be replaced with a Sullivan. And the tail braces will be replaced with pull pull cable. Pull pull on rudder too.

I think that covers my mods. Good luck with yours.