It doesn't matter what the first form is (from WH13 to WHN13-CNC) the equipment right after upgrade reaches parameters similar to a different one particular Headstock balancing On TOS Varnsdorf devices the weight of the headstock is balanced (depending upon the equipment style) via counterweights In the column or through https://www.sedlacek-t.cz/whq-13-cnc-tos-varnsdorf/