I made something similar to this, there's an easy solution to the wobble problem. I used the MDF from a pingpong tabletop i found in the sorority house's dumpster to make a case for my turntables and mixer where the lid turned into a table. obviously, wobble was not an option. the trick is to drill holes into the legs about 2/3rds from the floor (I used the widest gauge conduit at home depot for legs.) fit two threaded rods into each pair of legs diagonal from each other i.e. make an X pattern. then, expand them with turnbuckles to snug them up. when you break it all down, the rods store inside the legs. worked great, made gigging easy, but even without the million lbs of Technics 1200s in it, that thing was a beast. i tried to keep it a while after I sold my car, but finally gave up on lugging it around.