I started installing Tone's hitch today and ran into a problem. I think I followed the directions correctly, however when I drilled the first inner hole it did not lign up with the one already drilled in the frame. It was really off. Does someone has better and more precise measurements on how to drill it correctly - like so many inches from the top, from the right, etc. I now need to drill a second inner hole hoping to drill it correctly, then attach the hitch and re-drill the one I already did. Any help on how to do it correctly is appreciated.

Thanks.