You do know that you need to bring it up to within a half inch of where something you could work on would be. So if is was sitting on something exactly one inch thick you wold have to tell the laser that it was 1\8 inch as it would be 1\8" above where the crumb tray would be if it were still there. To have something underneath of a fixed height to make measuring easy here is one of several designs folk have come up with…,
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