Wow. lots of responses here and apologies if I'm duplicating someone's idea as I haven't read all. Lazlo got me going, though. Epoxy a 3/4 inch block under the deck to the shear(shaped). use a forstner bit to cut the pocket and router (or saw) a drain channel, then channels for the deck line. I think I would attempt to saw both and use a round rasp to finish and clean it up. Haven't done this myself, tho, so just how I'd start to approach it. Dave
Thinking a little more about it, I'd pass on the drain and line channels and just do a nice round over on the pocket. Simple. Dave