[MrFlippant]

What new feature Greg?

In the latest Beta (and the latest Alphas before that), there's a new "measure" tool. That tool also has a built-in scale option whereby you can measure part of the model, and then change that measured dimension to what you want it to be, and scale the model accordingly. I measured the part of the handle the ring goes over to be 10mm diameter. The ID of the ring is 10.5mm diameter. I set that to 10mm and clicked the Scale button, et voila! I just did the same for resizing the handle to better fit the slot.it size allen key (60% btw) and will report back how well that works for me. The new ring for the original print is almost done, so will be back shortly with pics and results.