Quote Originally Posted by magicniner View Post
Repeat the up/down cycle several times to see if the error increases with each cycle, if it does you have a mechanical problem.
If you mark the screws at the front top with a marker pen and run up and down several times do the marks all come to the front again at the same time?
hi thanks for reply, done the up down several times but gets worse, it doubles the gap on the left rod, put red mark at front of rod and one was just off and the other by a bit so marks never came back, thanks again kev