Lou55,
Definately need some new main wheels and a different tail wheel assembly
I don't know why you say this. I find the wheels are very light and at the same time sturdy enough to sustain any kind of (bad) landings. And the tail wheel is strong enough and has plenty of authority on the ground.
The same wheels and tail assembly that on the GP Performance Series Yak, and I have not experienced any problems with them, so far. Esthetically they are not perfectly true to scale, but they do their intended purpose, and they are very lightweight. I am asking, not for the sake of arguing, maybe you see something I have missed and I want to know before it’s too late.