If the tailstock is to low, you could shim it using aluminum foil. If it very low, shim it using epoxy. Oil the top half so it can be loosened again. You will probably don't be able to ajust it for turning small tapers.

If you just need to scrape a few 0.01 mm on planes that don't slide, use a small diamond disk (dremel) and "scrape" it by hand (don.t use the dremel, just the disk). I did the same for adjusted the head stock of both my lathes. It will take a few hours, but who cares.