OK Folks,
Boy, working with this stuff is like working with melted marshmallows, only thicker. Vacuum sure would help get the bubbles out of this stuff. Despite my fears from what was rising to the top of the mixture once it was poured in the master, the end result seems to be pretty much bubble free except for underneath, where it doesn't matter. I did a lot of bashing the workbench with a hammer to try and de-gas, which must have helped.
I had to destroy my master to get it out, but apart from that, I'm quite happy with the result. Now to go throw some resin in and see how it comes out.
I have enough silicone left to make two more if I can remake my master. Needs a remodel to get the end result out easier.
What do you think?
Russell.