Here is a better view of the Self Aligning mold being tested on Marauders feet. The center hole is not for alignment but to ensure the mod stays together at the center. The square build up ensures the mold can only go together one way and will not slide, so no alignment pins are needed. As its a sprue mold, I will be using backing boards to keep the mold from splitting.
I'll complete the mold next weekend and report my results.
**Post Edit**The mold is finished and turned out better than even I expected!