Roger:
Let me pass on some things that I would hear if I ran with bit changes and flip ops:
"Whoops-I forgot to re-zero the bit"
"Since I'm changing bit's so often I need to just stay here and watch the machine"
"Whoops-I lined up the board the wrong way"
"Whoops-I forgot to change the vacuum zones"
Now: If I am using blind mortise and tenons then all cabinet sides need to be cut from the face and to achieve the tenon the bottoms, stretchers, and nailers need to be cut from the back. If I am just cutting butt join parts then all can be cut from face side. The only thing I would be flipping a part for that I can dream of is to do a bit of predrilling for assembly screws. If instead of confirmat or plain drywall, I use cutter head #6 1 5/8" cabinets screws (which we do now) then I don't need a predrilled hole. They self countersink. That's my thoughts on it anyway-Now you can tear it apart!!