The Weller sheave has been specifically cut for the 31 mm weights. I would not use any other diameter weight.I know many people already have 30mm HV Weights, so I wonder if they can run them in this sheave?
Without the spacer maybe??
I have 3 sets myself and planned on testing mixed weights later, so that came to mind.
Not a lot of info put out by Weller along the lines of installs/reviews. In fact, if it wasn't for this forum I bet hardly anyone would know about this product.