I purchased a Domino several months ago and really love it. I built a baby crib using the domino to attach the spindles. The domino saved many hours of time versus cutting mortise and tenon. It has been great fun. However, one thing keeps giving me trouble. When using the fence at 90 and setting the mortise height, I have the fence slip beyond the 20mm (or whatever setting) making the cut slowly drift down. I'm down to checking the the fence is against the stop before every cut. I set the cam lever pretty hard such that I'm afraid of breaking the lever. Has anyone seen this? Does anyone have a suggested fix? I've wreaked or had to recut new mortises on several occasions. Looking forward to suggestions.