A week ago I mounted my Jelco 750 LB with Shuggie's collar on my Scheu Premier. I tried both my MC Scheu (a MB glider like) and my Denon 103R in the arm and both are doing well no much diffence with my former arm, a Scheu Classic 12" unipivot. This week I gave my Dual version of the Shure V15-III LM a try, never could have thought that this cart would do so well in a 750 LB. I am not saying that it's better as my MC's but it does sound very well.
Some pics....
Ronald.