I know I am not much help at all, but my guide scope is mounted SOLIDLY to a V bar, which is bolted to the tube rings on the main scope. There is NIL flexure, and the newer images I believe show that too.
No guide scope rings for me - tube rings holding the guide scope bolted to the main scope tube rings. Solid as a rock - in fact, can use the guide scope as a carrying handle if I wanted to
