I got a commission to build an entertainment center, which essentially consists of three base-style cabinets joined together. The designer has something very particular in mind, however, and originally sketched out a set of plans that involved no face frame, and instead, called for a lot of mitered corners at the front to avoid showing seams. For the sake of structural integrity, and to make more efficient use of the material (the original plans called for sides that are double-thick ply), I've convinced him to modify the design so we can do a faceframe instead. But he has a residual concern about the seam between the faceframe and the side of the cabinet showing, and was wondering if I could join the face frame to the sides with a miter joint (the sides are a frame and panel construction, but with the frame overlaying the plywood backing rather than the panel sitting inside a dado in the frame).
I'm worried this is overly complex (I would have to pre-miter the frame of the cabinet side wall before laying it on the plywood panel, and line it up perfectly so it could form a tight joint with the face frame), and instead, I can still do a 90 degree butt joint between the face frame and the sides, but plan the grain in such a way so that both the side grain of the face frame and the face grain of the sides are showing a rift cut at the point where they meet (with the grain direction at approximately 45 degrees) -- also take care to cut from the same board so there's no significant color variation (it will be getting a dark brown stain in any case). Then it's just a question of a clean cut and proper clamping when I install the face frame so that there's no gaps in the joint.
Or are there options I'm not considering? I've attached a jpeg of the first page of the plans -- the top view showing what was initially proposed is in the lower left.