Believe it or not, I bought my own legos. My son would have a complete conniption if I broke up a set to do this. I bought a random 750 piece bag from a seller on ebay. I got SO MANY flat and specialty pieces and not too many regular bricks so it took a while to piece this together. It's holding so far!
I coated the inside with mineral oil, to be safe, and some oozed out along the bottom. I can see just a little bit of black batter along the bottom but nothing like a major breach.
I thought about making my own mold but I really like not using a wooden box. I love the stand-alone silicone molds because if you don't want to gel, it's much easier to control. A homemade silicone mold (stand-alone, non-liner) would have to have the ribs and reinforcements and I don't really know how to do that properly.
I am hoping Carrie from Nurture hears my plea!!!
Soap is in gel and out from under the covers to cool on the counter. I had two little bumps inside to tell me where 4 inches in height is, so when I unmold, I will take off the bottom/platform and push it out from the top so I don't get gouges from the bumps. Fingers crossed.