When you do your crosspoint mapping, you will be doing it in the MAIN V/K Pair Assign (menu page 7322.5). Once you have made all of your assignments, you can map the actual button layouts to any one of 14 tables (all tables use the Main V/K Pairing as their reference). You assign whatever table you would like to whatever M/E or AUX bus you would like. You can assign different tables to different AUXes, so as you delegate AUXes, the button mapping will change on the AUX panel. I think that this is what you have described as what you want to do. When doing your MAIN V/K Pair assignments, you can associate key inputs to their fill signal. In this way, you don't have to map the key hole-cutters to the panel. A special buton on the AUX panel lets you see & select key sources, even though they aren't mapped to active panel buttons. And when you press the SPLIT button in te keyer panel, the source names & buttons change to the key sources so that you can program breakaway keys. One trick that I do is this: if I have 2 channels of DDR as a V/K pair, I often map them as A with B as its keyer. I also map B as a source with A as its keyer. In this way, I can easily use either A or B as a V/K pair, as Video only, or use either DDR as the breakaway hole-cutter for any other keyed source on the switcher. I also do this with Frame Mems (FM1=fill with FM2 as key, FM2 as fill with FM1 as key, etc.) - that way ANY FM can be used as either a video fill, a key source, or as a self-keyed source.