It may be helpful to check out the site by J. Stockard fly fishing JS Fly Fishing: Rod Building Supplies, Fly Tying Materials
They have a very good graph showing the size and numbers of guides for whatever size rod, and also a good spacing guide, showing where to position the guides on the blanks. This, while not gospel, is a good aid. Hook and Hackle also has good directions for building a rod, and a chart for numbers and placements of guides. Hook & Hackle Fly Fishing Tackle, Fly Fishing Supplies, Fly Tying Supplies and Fly Rod Building Supplies
I am in NO WAY affiliated with either of these businesses, I like them, I like the people you deal with at each of them, they're fair priced, and customer orientated.
Webrx ... sorry I didn't address your other question. When you order your rod blank, ask the people you get it from to measure the tip, and order a tip top to fit. And, yes, from my position, everything will be done by hand. If you're going to automate it all, why bother doing it?