Ok, going to Home Depot right now to get 4mm tap. Anything else I should buy besides the hex and ball drivers listed in the manual for puting the rest of it together? Thanks for your replies guys!! By the way, I've read the first 55 pages of this post in the past 3 days and it's helped a lot! I wanted to read all 440 pages first but my itchy hands are getting the best of me!