The Fourmost Miter Saw
http://www3.towerhobbies.com/cgi-bin...&I=LXG875&P=ML lets you choose any angle and is great for stick building
The Miter Sander
http://www3.towerhobbies.com/cgi-bin...&P=SM&I=LXG876 and angled slides
http://www3.towerhobbies.com/cgi-bin...?&I=LXJVA4&P=M add even more flexibility for getting a perfect fit.
My brother has the cutter mentioned in the first post and he likes it too. He is building an SE-5 and the back of the fuselage is all sticks. You do have to keep a sharp blade in it to prevent crushing.
Maybe we need all three. Use the saw to get close. Use the razor blade to get really close. Use the sander for ultra fine tuning.