Granted this is not a custom figure, but it's a project that I am proud of. I didn't build the actual converter chip, just the body/holder shell around it. I used the NES cleaning kit for a base, and then cut around the area to fit in a Famicom cartridge. The converter is from a Gyromite game, and it is held in the shell with QuikPlastik (for the sides) and weather stripping (for the top/bottom). The Converter can be taken out and put back into its original NES cart. I'm waiting to find another, more common, game to exchange the cart, so that I could put my Gyromite back together. Hope you like it.