RE: balancing spinners and props
Mike, I have a High Point balancer. Over time, I discovered that just getting the balance 'close' is good enough. Because the balancer is SO SENSITIVE it is an exercise in frustration to get the balance 'perfect'. You will be chasing the perfect balance for hours, always getting close, but not exact. I think the darned thing is sensitive enough to detect 1/100 of a gram!