Hi, Need a tip or two. Long story short: I am sick and tired of plastic wheels and would like to make a new cnc machine based on metal parts all the way. Another build gave me ideas for how to proceed: Textile machine bearing structures CNC engraving machine See the pictures on how the guy attached the rods to the v-slot extrusion. One thing that has me stumped is how to ensure I drill the holes through the metal rods correctly so that the holes on each end are perfectly parallell vertically. It taks zero effort to mess this up, something my lack of metal working skills most likely will ensure happens... One idea is grinding a flat spot on a rod, punch and then drill that on my ****** drill press. Then screw down the rod on a v-slot rail to secure it in place. Rinse and repeat on other end. Any ideas for another approach? Grinding down a flat spot with my meagre tools means filing and that SUCKS.. Any briliant insights would be much appreciated.