Quote Originally Posted by LambdaFF View Post
To be honest, to reach that kind of precision, you need a perfect bed levelling and with a dual head it will be a pain.
If you NEED that kind of precision, why not go to a resin printer instead ?
Bed leveling is not super critical if you make the first layer thicker, say 0.2mm.
I have printed PLA at 0.05mm with a Reprap using threaded rods for the Z axis, it worked quite well but of course it takes forever and then some