Thanks for all the critique's. Will be going to An Rv show Friday and there will be several TC's there and should be tie downs to look at. Because I'M building, not buying, the belly bar was certainly the easiest to make. I do not have to drill any holes, Ford must have all kinds of options on a 550 that they are used for. Mine is quite high with the 19.5 wheels and had to re-engineer the hitch to get the trailer level, the only off roading I do is parking the trailer in the back yard or race track parking and the TC will be on the Patio. I am also making that, about a quarter of the way there. By the way, drilling the sides of a frame within in reason does not weaken it at all. We had a frame drill at work because we mounted a lot of 5th wheel hitches that had 6 or so on each side for the 18 wheeler's.