Sounds like one of those ideas I should of thought of first..............
Just received a Woodcraft flyer and it has a tap that threads wood the size of your spindle threads. Says that you can thread the hole in a piece of wood and then use the block as a glue block so that every piece basically has its own wooden face plate. You just screw the block directly on to the spindle and turn. I guess you could make face plates as big as you wanted. If you turned the thing round after it was threaded, but before you mounted your piece, it would always be centered also. Any pros or especially cons?