Tell us about yourself!
If the control software is written in a way to move the build plate always to the same starting point all you do is fill again until the resin reaches the build plate. If you don't fill the vat to the exact point every time you will have to re-calibrate your display size every time.
It depends on how tall an object you print. It is probably not something you need to worry about if you build this machine.
So have you guys figured out yet how to do it? Seems Prodways figured it out and pushed the speed up to 20mm per minute