Another incredible example of what is possible if it can be imagined - bravo
I’m sure you’ve considered this, since you’re a rather critical thinker, but what’s to stop you from having your power/fan box being attachable and detachable to vacuum boxes of different sizes? I suppose it’s easier to have jigs to cover the excess areas, and definitely would save space and money, so there’s that…but having it be modular would be pretty neat.
Your design also has the benefit of elimating any sort of bow that paper gets when placed on the regular crumb tray. I make all of my earring holders in my machine, and occasionally the small fraction of focus height difference will cause the engraved areas to be lighter or not as sharp, due to my laziness of only using magnets to stop the cardstock from moving. I also rarely deal with flyaways as I very slightly under power the cuts so they can be perforated and pop out fairly easily.
This is a project that I would love to make, but as I mentioned, my laziness will impede me from ever taking it on, though your examples are absolutely tempting