I have been using nx simply cause I use it every day at work, but would like to do an independent cam program at home something simple that will do actual 4th axis programming. What are you using that you do 4th axis machining continuous. I own Bobcad v23 but it will not do a continuous spiral x, and z 4th axis machine program. If nothing comparable to nx then I will just continue my standard route of staying at work a bit extra to do my programs.