[CAD_CAM_EDM_DRO] Majority of CNC conversions? Bridgeport or 3-i n-1 or ??

Sorry if this has been covered before but I was wondering what the majority
of you guy's have or are converting to CNC?

As for myself I'm in the planning stages of a CNC build up for my Shoptask
3-in-1, I just ordered the ball screws and ball nuts from McMaster-Carr a
few days ago and will be drawing up the stock ACME screws and nuts this
weekend so that I can do some CAD designing for the new screws. I'd like to
get some feedback (positive or negative) on my design proposal so if you can
view Pro/E files I'd happily send you a drawing or file.

Thanks,

Mike Mueller
Antioch, CA