Yea, I am going to go with the center punch, and step drilling for my rails. FedEx says they will be here in five days. I just got three meters of 4590 profile that will become my gantry. I plan on assembling all my electronics this weekend and running some test code through my "machine" to make sure that everything works properly. I can not wait to start making chips with this thing! Good luck on yours, and don't forget to post pictures as you go along.