As you can hopefully see from the photo, I have removed two cracked jewels from their settings and have preserved a nice sleeve of brass to rub in new ones. The problem I have is that, as is common with cracked jewels, both jewels disintegrated when I pushed them out. I have already worked out the pivot holes from a belt and braces pivot measurement and jewel hole measurement using jewel gauges, before I removed them. The problem I have now is I don't want to start jamming a vernier calliper in the hole to check the jewel size and risk damaging that nice brass lip on each setting and then not be able to rub the jewels back in. I was thinking of using a pusher to check from the underside and then take the next one up (and so on) from the topside until I find the right fit but was wondering if there is a safer method of measuring or if anyone had any other suggestions, maybe measuring the underside and then adding a tenth or two?