Al--I have so far found the lower hull to be the challenge. The transmission does not align with the hull. There is a large indentation when you put them together. I am working on how best to eliminate the problem. The road wheel assembly takes time as every item must be cut, sanded then placed in position. Looks pretty good when done-- just consumed more time than I thought it would. No problems with the turret, vinyl track is good. And the lower-upper hull mesh well. Coming along.
DJ