How to cut 24" long notices (birds mouth) into panels for jointing closet sides to sloped dormer ceiling panel.
Hey guys - I am relatively new to woodworking and am stumped on how to cut, was essentially a 24" long birdsmouth in several wall panels used as tops to custom closets in a dormer.
Two of the three cuts are simple 31.5 degree cuts-
1) trim (bevel?) end of board on TS at 31.5 degrees
2) measure from short end of bevel, the thickness of a similar board (which is square cut) to inset into birds mouth (when finished) and make (1st birds mouth cut), a shallow 31.5 degree cut (½ thickness of that board).
NOW THIS IS WHER I AM LOST
3 )rotate board to cut opposite angle 58.5 degrees so cut meets 1st birds mouth cut and makes a 90 degree birdsmouth (measurement for board thickness), - IF MY TS would adjust that far (max 45 degrees), I would be done BUT..... .
SO.. I have thought about-
-routing but can't find a bit or method to do that at an angle.
-Miter saw -but only 12"wide.
-dado set but again not enough angle unless i do it on 1st cut at 31.5 degrees, but that just doesn't seem right ..
Any Ideas? Am i missing something obvious or not?