I just received my Mid*40 kit from Tower Hobbies. As is usual with Sig kits, it is really nice. I'm going to build it as a tail dragger, and use my Tower Hobbies 46 for power. I read in a review that when building this plane as a tail dragger, one should consider using an after-market tail wheel assembly in lieu of the standard attachment of the wheel wire to the rudder. I built a 4*40 using the standard installation, and even after 37 flights off of grass, and some pretty hard landings, it hasn't caused any problems. Any advice? I can't wait to get started!! Glen