Erik, the stop switches on the saw have crapped out MANY times and we've been back and forth using the master power as an off switch which is annoying and unsafe probably. Currently we have the off switch on the front of the saw functioning and control it from there. The slider-side switch is out of the mix. There were a couple failures of the 'on' switch as well but those haven't reemerged forever. The shaper has had the 'off' switch go countless times but the more persistent problem is the limit switch on the up/down. When we got the machine, we used to zero out the height so that we could have easy and repeatable set ups on all of our cutters - just a height, cutter direction and fence setting for everything so operators didn't have to fuss around. After that limit switch kept crapping out, Felder told us to stop bottoming out the spindle so we no longer zero out or lower the spindle beyond what is necessary. Currently, the up/down buttons don't function (it's our third go around on this and the micro adjust 'up' button hasn't worked for a long time). We are using a 9.6V battery from a cordless drill and putting the wires in the contacts to raise and lower the spindle. It works but ain't the best for micro adjusting. More art than science I guess!