I've never made doublets before, but I'd like to try.
My concern is that I don't have a flat lap. I only have a trim saw, and a 6-wheel Diamond Pacific Genie.
Is it possible to attach the dome to a backing without using a flat lap to grind them smooth? If so, how do I ensure a proper fit before applying the epoxy?
I'd like to be able to use a variety of materials for the doublets, ranging from very soft (like opal) to hard (like agates) (e.g. opal with quartz domes, plume agates with turquoise backings, etc.).