Hey Guys,
On the U bolts this is what the chock looks like http://www.baxleycompanies.com/LAChock.html and I added the u bolts for a little extra over the tubing of the chock in the floor and bolted them in place (one on each side). So my wheel chock was originally in my cargo trailer and I installed it myself making sure to hit the steel frame of the trailer. The u bolts did and the 2 regular bolts did not so I used large washers to insure exta hold. Now this was hauled to Texas from Maine with no problems. My girlfriend and I bought the Mountaineer and the cargo trailer was traded in and part of the deal was for them to install the chock in the RV. Well to make a long story short the tech was good about it and he cut a panal out of the underbelly to access the underside of the floor but he first had to drop the spare tire and frame for the spare tire. He attached the u bolts and the two main bolts into the floor and it seems good. Then made a larger panel and caulked and screwed it into place to make it easy to get to for removal someday! In all it kinda racked up some time and the tech joked about it eating up the salesmens commison!!!
Also since the floor is linolum I put a small square piece of carpet where the front tire rocks forward into the carriage and touches the floor. Mine of course is there and it really isn't in the way! And on the ramp it is kinda steep! Make sure when going in it's really set up right and coming down I would like to use the rear brake but two feet down is beter for me and I seem to half way down (using the front brake only) start to skid but with both feet down I have gotten use to it. On rachet straps I just started to use them. Before all I used was a strap around the front tire to the chock. Once I added the staps all I could get to was the engine guards and at that angle to the rings in the floor was bad and the hooks would pop out when the bikes suspension went up and down (I'm not a big fan of collapsing the suspension when trailering) but a little duck tape around the hooks in the rings fixed it!!! On the back I just wrap a strap around each side of the rear tire and that seems to keep it from going side to side. One more thing make sure the fifth wheel is set up right to your truck (mine was to high in the front) because with weight of a Harley on the right rear coner of the rv my right rear tire showed wear after the first 6000 mile's. Since then I rotated my tires and readjusted the hitch (one hole lower) added airbags to my truck and the last 6000 miles everything looks good. I also try to keep heavy cargo next to the bike or in the front cargo area in the left front! Hope all the info was helpfull..