Hi John, you have a PM.

Thanks for the link Irving. I do't know enough about my machine yet to fill in all of the ratings to get all the way through the steps. I'll save the link for future reference.

With regards to my own machine I was thinking for the bed and the side-to-side that I might need 2 rails with 2 carriages on each (4 in total) but when I look at other builds I think this sounds like an overkill. What do you guys think. My plan was to use 27's on the bed and the side-to-side, and one large one for for the tool up and down. (forgive my terms as I'm never sure what the x,y,z is lol)

Does this sound ok or overkill?

Thanks
Paul