I have replaced all the rack and pinions on my prt alpha and everything seems tight. this is a cut the first pass is with a 1/4" downcut at 3ips 10k rpm .45 pass cllimb and a cleanup pass at 1.5ips usually the part comes out right but there is so much slop not always. anything above 2ips gives me a fair amount of slop sometimes. I don't find any more slop then usual when I tug on the machine there is a little in the z that I have not dialed out. I am wondering if it is a ramping issue? my software crashes and the settings get reset. so they may not be right.