On to fitting the tapered sliding dovetails. I cut these on my router table as if the mortises were not tapered, and then form the tapers by hand with chisels. It is extremely helpful to rub pencil lead on the tapered edge of the dovetail mortise. When inserted into the mortise, the lead rubs off onto the pins (or tenons, I'm not sure what to call the male part), revealing the high points.