Chain mortisers almost inevitably clamp to the workpiece. Mostly because if you're cutting mortises big enough to need a chain mortiser, the workpiece is by def

Chain mortisers almost inevitably clamp to the workpiece. Mostly because if you're cutting mortises big enough to need a chain mortiser, the workpiece is by definition too unwieldy to move to the machine. Biscuit joiners, mortising jigs for routers, and the Festool Domino are also hand-held tools, or at least can be moved to the workpiece. What they're doing is kind of slick, but it's academically slick. That router in the video you posted is pretty nifty. One thing that's to be noted is that cutting single pass half-blind dovetails requires pretty a very accurate offset between the pin board and tail board if you want the edges of the boards to line up when you're done. Getting the offset right on the fixtures is basically half the problem.