I am trying to assemble an exercise bike that I bought on Amazon. The first step is connecting the main frame to the front "stabilizing bar" -- picture a half cylinder that goes over a thick metal rod and has a couple of bolts to hold it all together. The problem is that one side of the "half cylinder" is slightly bent on one side so it won't fit flush against the rod. I've tried bending it with pliers and banging it with a hammer, all to no avail. Any other ideas for bending the corner out?