[8D]I used a Sig 4* 120 gear on mine. Depending on the finished weight you may need to make a bungie arrangement for it. Using 3/32 wire, that fits the pre-drilled holes, make an angle so when fitted in the holes the angle is approx. an inch below the center of the gear. Put a small hook in the gear at the fuse and wrap a rubber band around the wire and back to the hook. Works great. I went to more trouble with the tail feathers. I trimmed about 2 inches off the rear of the fuse so the horizontal stab could be moved forward enough to line up with the vertical stab. I made a split elev. and a new rudder that would fit it. You will need to re-route the push rods so they exit below the horizontal stab. Put an 1/8 inch lite ply plate on the bottom of the fuse to hold the tail wheel assembly. I used a Sullivan tail wheel. Shortening the fuse made no difference in the planes ability to fly. For a real thrill put a set of wheel pants on it, you now have a late 30s' or early 40s' era plane. Good luck!