I sent mine to Christa Lee because I wasn't confident I could transfer the customs. She's apparently done a few of these, which is more than I've done. She charges $300 to install donor parts to a bare Cosam board, but cut the price to $150 since @SnakeGrunger 's board already has SMD parts in place. I will inform my wife that buying SnakeGrunger's board netted me a savings of $80, so it's actually good for the family.
If you don't get the expensive DVIZIX shell, you can use the Genesis model 2 shell. However, for 32X carts to fit, you either need an extender/adapter or you need to trim the model 2 shell.