For your wedge on the tb I take a 2x4 cut it at a 45 degree angleon the 4" side. Turn it around and do it again, cut to length, notch out ends for edge, and add sides and bottom, made a frame. With a frame, keep an eye on them if comb isn't straight and you catch it early just straighten it. While it is fairly fresh its easy to bend this way and that.
Joe