Difficulties with wearing a device? discussion

I’ve worn the standard vice (70mm) before, but it never quite filled out the cage. That’s why I switched to the vice mini (40mm), which fits better, yet I’m still struggling with ring sizing. I use the shortest spacer since that seemed like the logical choice, but every ring either restricts blood flow in some of my sack veins or is too loose and needs a waist strap to stay put. The 44mm ring seems to be the sweet spot (I’ve read elsewhere that you should be able to slide your index finger up to the first knuckle), at least until arousal kicks in.

Is reduced circulation normal, something I just have to live with, or would switching to a larger spacer make a difference?