just wanted to warn others about the new 104/d control. We have a 4020 with it and just got the new 1.05. software after many months of suffering with a machine that is a liability!! The new software is NOT a cure for many of the problems!! After one day with it I find that at random times it doesn't continue to read a G0 and begins to feed to I don't know where to. After totally restarting the machine this problem goes away for awhile, but the side affect is all tool positions are lost and some random heigth offsets are zero'd out. So basically you have to recheck and reset everything again (set-up again)!!! I will continue to post any problems with this machine until ALL of the problems are resolved with it. I have been told for the past six months that these machines run great, but from what I read there aren't many at all that do if any.