I'm building a 5e3 tweed deluxe cab and i'm about ready to fit the two front facia panels that the baffle mount to. Rather than scribe them in to the top and sides I just want to fit them in place butted up to the sides, top and bottom of cab. Is glue and clamping alone ok for long term durability etc? How do you install them if not scribing them in? Also are they both 35mm or around 1.37" wide when cut before fitting?