Here's a thought; some one told me many years ago to try this, but I never did get around to it.
UN-build some of those frames! In other words, try using the torch to disassemble the frames and you'll get an idea how much heat etc it takes to get brass/silver to "flow" properly. Seemed like a good idea, but again, I never did get that far myself.
Just my $.02. Cheers, Dr.D