Some updates from Finland.
Printed gears has worked fine. Havent milled much, but still some and without any problems.
Leaking, old brass slide-bearings helps (it leaks a bit
oil continuously to gears).
Planning to remove that
cover and give it to friend whos working on machine workshop.
He can use CNC machine to mill small lip for rubber sealing to prevent oil leaking out,
but still let the brass bearing to get needed oil.
Also I've been looking new toolpost as the now used it totally worn out and beyond repair.
It might be wise to make whole new top part of cross slide so i could use smaller tool holders,
like cheap ones from Ebay.