single motor printing and bootstrapping

I need to get z figured out first. Once I have a good z motion I can start trying to print small parts. If i can get either of my projectors to a size of 10cm x 7.5 cm I can get a .1 mm resolution and print my own connectors for xy motion and etc. if I have a long z motion already I can print larger parts so I am aiming for a specific bed size but will take whatever I end up finding at the second hand store to salvage. the z motion should be independent of the tank I use.