Is the rear leg of my roll bar too short? See pictures. The front tubes of the roll bar is sitting on the nubs (almost). See the first 2 pictures. The third picture shows the rear leg when it is bottomed on the pipe. They are aligned but the top is not inserted. If I raise that pipe for full insertion, the rear leg is about 1 1/4" or so above it's full insertion on the lower pipe. Should the rear leg be all of the way down? Do I want to grind the nubs off? Is the rear leg too short?