Well it looks like my mold didn't work out--the first part I poured didn't set properly on the inside due to under mixing parts a + b together, and when I tried cutting into it, I was greeted with lots of blue goo. :( The second half was fine, but since I had to cut into it... its not really fine. Sigh!
The mold release really didn't seem to work--though I realized RIGHT NOW that maybe I was supposed to brush it on? That's an expensive 'oops'--each one of the little kits cost $25. :(
My little monster's arm is broken, too. It was a clean break so he'll be easy to glue back into working order, its just a bummer. Poor little guy!
I will be trying again this weekend... maybe with a one piece mold this go around? I think I have to do a little more research before trying again.