Ok, I think I have the support struts in the back of my 45MX too tight, I went to do a larger print last night and the carriage will not even top out, it seizes up about 6" from the limit. Also, it goes out of alignment when higher up, the single screw behind the lens is maxed out. Any starting point at to how many turns the bottom of the struts should be, I am not sure where my manual is right now...