I was told it was a pretty simple install. I'm going to do it on my new Mini Mill. The local Haas service center has always helped me with repair issues over the phone and said they would help with the 4th axis drive if need be. Probably will not do it for a few more months since my other two machines already have 4th axis. Besides, I'm sure there is plenty of help here on the board is case you get in a jam.