I made my first rubber molds yesterday and cleaned them up this morning. I REALLY need to thank the maker of this set of youtube tutorials. They're awesome and explained everything very well for someone like myself with no experience in it. Casting Tutorial
I needed a lot of tires for some conversions I'm going to be doing with some GW Land Speeder Storms so I thought this would be a good way to attempt 2 part casting. Here's the bottom of the mold. I also didn't want to be completely discouraged if that didn't work and was told that single part molds were easier. So I made some casts of some flat objects to try it out. I don't even think I'll use the top mold but wanted to see how it worked (I don't need any of the parts). Anyway once the top of this 2 part one is done I'll attempt to put it all together.
---I've removed images of the molds as I'm not sure I should be showing what I'm casting, despite it being for personal use---
Also I hated megablocks growing up (Lego Fanboy) but at $15 for a giant case of generic bricks you can't go wrong.