My cutter has been acting up over the last couple of months and its to the point where its a daily occurrence. It will cut perfectly fine on a couple of jobs, then it will leave some white at the top on a job and correct itself not too long after. So I go into the settings and adjust for it, and then it works fine. Well now, after I adjust, its fine, then the next job after is off again. I've done the 400mm square and I've tightened the belt as well and I don't think it can be adjusted anymore. So my question is, how difficult is it to replace the belt? I've had the cutter for quite a few years and everything is original except for blades of course. Also, will this actually solve my issue? Thanks in advance.