I got a Form 2 with the express purpose of going from print, to shell. The “castable” blew apart the shell due to too much expansion. (as you no doubt discovered too) Am I to understand that the CLEAR burns out perfectly, with no shell cracks? (I read up, and I see you have “minimal” cracking)
When you sprued the prints up, you just used regular casting wax? I’ve used Baer Bronze in the past. I restore antique wooden canoes, and I’m trying to replicate unavailable hardware. If you are used to this method, I’d be delighted to send my jobs to you. it was an experiment with, and for Baer, They are mostly large artistic pieces.