Finally, a little casting success!
I finally have a little success in casting a Motobrain. The Motobrain looks great and the mold is intact! Unfortunately, I made two significant changes compared to the last attempt so I do not know for certain which change was responsible for the better outcome. I changed both the resin (because I ran out of the preferred resin) and the release agent. As I said last night, the release agent I used was cheap floor wax (and AquaNet hair spray). The resin is not preferred because it is harder and not thermally conductive. The customer I will send this unit to doesn’t require high current capacity so I decided to make use of this resin rather than waste it.
I am still going to give a silicone mold a try but I won’t have to wait on it which pleases me greatly!