Cutting the bevels

Router up to the marks, set the height using a scrap piece or end and one of the tenon ends to check it.

Note: It would be better to slide the piece along a rail in the rebate so the height is taken from the rebate and not the edge of the bevel

Note 2: Don't try and use the router backward to do the other end. It doesn't work!

Trim up to marked line, I found it easier and neater to use a Stanley knife. The chisel, although sharp compressed the grain.