So I'm making the same truss rod routing jig that pretty much everyone else on TDPRI uses. A 11 x 36" MDF sheet (my tablesaw doesn't go to 12" lol) with some 2x4's screwed to it to use as a guide for a router sled. Couple of straight MDF offcuts used as rails to keep the neck centered. The only real problem I've encountered so far was one of the 2x4's (which came from the Home Depot scrap pile, LOL) was warped. So I smeared some glue on it, and clamped it to one corner, then pulled and clamped until I got it straight along the edge. Then drilled and screwed in a screw every 4" down the length of the jig. This 2x4 is straight now, seems to be holding without the clamps too. Should I be worried about it moving or splitting on me? I guess I could use my router to even up the edge if it starts to move again, right?