I'm new to machining, so far I only have a $50 HF drill press, a 8" caliper, and a set of drill bits. I want to make some linear bearings based on the THK aluminum angle design, with two parallel holes on each side. One problem I have is drilling precisely. What is the best way to lineup holes? Right now I'm using a carpenders square with a pencil, but I just can't drill a hole where I want one. Usually an 1/8" or more out of line . What about blue layout paint with a scribe? What is the prefered method? Thanks...