I'm not sure I understand your needs precisely, but two points: 1. Douglas' technique will work as stated, and can also be accomplished without a Family Table. If you were dividing one part into three with two parallel planes for example, you could create necessary cut features in the Master Model, suppress all of the cuts, copy the model three times, then resume the different cuts as necessary in the copies. 2. You mentioned fixturing. If you are creating a fixture with multiple blocks, then nesting something complex into these blocks, you can assemble "uncut" blocks, then cut them all within the assembly using the complex reference geometry.