There are no modifications needed for the 4 stroke installation. Oh, you'll need to drill a hole in the firewall opposite the stock hole that is drilled, but that'll take you a whole 2 minutes probably.

Standard servos are all that are needed for the plane. As for radio selection, that's entirely up to you. I'd get a computer one though. Hitec, Futaba, JR, etc all make great radios. Me,,,personally, I fly with a Hitec Eclipse 7, but that's just me. If my wife asked you which radio do I buy my wonderful, glorious, loving, #1, handsome, best, hardworking, dedicated, supportive husband, you'd better tell her a Futaba 9cap. Oh,,,channel 57.

As for colors, I added some white stripes to mine to help with orientation. Made a lot of differance. I have a great pic of it showing the color difference on the bottom, but at work now and unable to post it.