we've got a old 358 king that the y gantry seems to be out of square ,during punching the holes will slowly dirft out of line . weve had this issue before a yr or so ago and service tech just told us to shove it back and it worked for a good while but now im looking for a true fix . anyone have any ideas where to start with this? ill be honest and say i barley know anything about this machine and any and all help id truly appreciate