I have built about 8 Up-Roars and yes, that single wire landing gear is pretty much junk. I finally broke down and built myself a double wire LG just using piano wire and that did the trick, I still have the gear out in my shop. By the way, the weak spot on the plane isn't the former in front of the wing, it's directly behind the wing. Not a lot of beef back there and I have had and seen them break the fuse there just from too many rough landings.
I liked that plane so much I made templates of my second kit and started scratch building them for myself and friends.