Hope you don’t give up on the Orchard list after getting replies
like the one from Rex below. That kind gentleman should be
ashamed of himself for both wasting the lists bandwidth and for
offering sarcasm as a professional response to a sincere request.
Sabinea do follow the safety proceedures and either drill that
tiny hole or try this. Next time you are going to solder two
halves of a hollow body together lay a Horse hair or two across
the seam before you bind the two halves together and solder. It
seems to create a trace of carbon which hinders the flow of
solder and leaves a small hole. It would be large enough for the
gases to escape. It should still be much smaller than a drilled
hole and would be harder to detect after completion. I believe
this was discussed in Oppi Untracht’s book Jewelery Concepts and
technology. Either way it is an age old technique that you might
want to explore further.