I tackled this headache a few years back. One solution is to do it
the other way round. Hehehehehe.........
What on earth do you mean? You'll ask. Well, depending on how thick
your reticulated sheet is, you could use a thin layer of silver and
solder it underneath your reticulated piece (since reticulated
pieces do not have even surfaces on the back either). Before you
solder the thin layer (about 50�=half a milimetre) make your bezel
to fit your stone. After you do that and the bezel is the closest
possible shape to your stone take a pencil and draw the shape of the
bezel, using the bezel itself, on the back of the reticulated piece.
Cut inside of the shape you draw and then measure and file according
to the fit. After that sand the back of the reticulated piece so it
becomes flat and voila!
You'll have a bezel for your cabouchon stone(s) hopefully without
too much trouble. Solder your "base" on to the reticulated piece
(you'll probably have to cut your"base" the exact shape as the rest
of the piece. There are other solutions though.) Bear in mind when
measuring to cut the height of the bezel to leave a bit of "slack"
so you can actually have room to work on your bezel to set the
stone. Hope that helps.
Lee Feenix Art Workshop