I want to make some window cornices and have a few questions. I could just wing this and they'd probably come out okay, but I want them to come out better than okay. This is for 3 windows on a bay with the smallest dimension from the window to a corner of roughly 6". So what I'm thinking is getting some large crown moulding and make the lower angle about 1" larger on either side of the window. I will of course have to be careful on how large of crown mould I use as to not go over my 6" maximum. Then basically put a piece of 1x over the top and let hang over about 1/2" (still not going over my 6" max). Once that is all figured, I will need to mortise out half the dimension of the back side to fit in a 1/4 ply backer. Then a couple of keyholes for mounting. Does that sound like I'm on the right track or not? I've seen these a million times, but you know how it is when you go to start cutting up lumber! Any advise will definately be appreciated.