RE: Anyone know what this is? Ice boat?
Yep, I have the same prop! That thing will move out with the right skis. You know, if you have the right base, and it looks like your rudder is spot on in size, you wouldn't need an additional steering servo, your rudder will do. You could simply use (large) adult skis OR by an inexpensive sled. It wont look as nice(maybe), but it will allow you to run in powder and provide steerage along with stability while turning. Yesterday my "Zombie" again went airborne! it turns very well at high speed (25-30mph) But will take flight in a straightaway at full throttle. Keep in mind my Zombie weights 10.8lbs with an empty tank.... I can send more pics of the sled and how its mounted if you wont?
Just trying to help. Oh and my arm is also killing me! On another note: Does your engine ever start in reverse? Mine will in cold weather...... Odd I guess....