Homebrew PCBs

Right now run out prevents me from useing my carbide bits plus no drill press. I am going to try aligning transparent brds on bare copper brds then center punchingfollowed by drilling. After all drills are done I will clean and sand brd  followed by toner transfer brd taped to top and bottom to try to solve this problem as there is a deffinate differencs in different brd stock bought as evident in amount of etching time with same set up. No 120 degrees and heated to 120 degrees exact.