On my .60 ultrastick (high wing) the front of the landing gear is even with the leading edge of the wing (wheels are behind the LE). On my fourstar (low wing), the back of the landing gear is even with the leading edge (wheels are in front of the LE). Since the fourstar is a low wing, they have to be forward. The fourstar handles better, but the stick handles ok too. That's all I have to go by, hope it helps.

If a LHS is available, take your measurements down and find a 40-60 gear that will fit. Most are generally same height. If you get a sturdy aluminum, you can bend it depending on your prop size. If you are ordering online, check the dimensions by part number. Level the fuselage with blocks and you can see how much ground clearance you need. My ultrastick only has a 1" GC at the prop, and I haven't broken one on it YET :-)