I am just begining to set CZ's , then hopefully on to precious stones. I love the flush gypsy setting but one thing I am finding difficult ,is getting the correct depth when I use a Ball burr. Sometimes its too shallow, then on one occassion, I nearly went through the ring !!

I get that judgement comes with experience but as you'll appriciate, if I could pretty much get it right from the off, that'd be an advantage

I have seen " Stone setting depth collets " which seemingly ensure that I couldn't drill down into the shank too deeply, but how do they (And do they) work ?

Thank you