Funny story: My Great Foam is seriously stuck to the aluminum foil. When I try to peel off the foil, it actually removes a layer of foam, so I need to use a grater or something, the plug is just a little big. Thanks for linking your Del Sol build, that was interesting! Before I saw that, I thought "There must be a reason that everybody removes the parts and place them with the foam on top," but yours pointed slightly up. I just wanted to put a little at the bottom of mine and build it up in sections, so that there was never enough weight to fall out, and that it could cure better.
So, it fell out right away, and apparently, that 'Stuff collapses on itself when you touch it, but I very roughly shaped the plugs tonight. I really need to wait to work any further. I just had a test and I have another on Monday.
Great builds, though! Keep up the good work!