We once were towing a trailer (bumper pull) thru Alabama returning to Michigan and purchased a new 5th wheel at a dealer along I-65 . The dealer , as part of the deal was to install a 5th wh. hitch in my almost brand new truck . They did ! They didn't get a bolt set from the maker of the hitch . I looked at it an saw "grade 3" bolts . This was a 12,000 lb + GVWR 5th wh. I noticed the hitch looked off center (left to right ) so I got out the tape measure . It (the pin receiver ) was off to one side by 1 & 1/4 inches ! It was 3 inches behind the center point of the axle ! Now this was a brand new Dodge Ram extended cab long bed diesel . They had drilled 1 hole in the wrong place and just left the hole there ! The bolts were NOT in or thru the frame on 2 points of the hitch ! So the only thing holding the hitch at that point was only attached to the sheet metal of the truck bed. They didn't even know what a "hardened" grade 8 bolt was when I asked why they didn't use them. I checked on the hitch company site and it required grade 8 bolts !They tried to trick me into signing some papers to release them from all the damages they had done to my truck . I was able to add enough "steel" etc. to limp to Tn. where relatives lived . I then jury rigged it and limped home to Michigan . I repaired the bed of the truck , removed the hitch and then had "LINE-X" spray the bed . Then took the truck to a RV dealer I knew and did business with and had a hitch put in the bed . They had put the hitch over 4 inches behind where it was supposed to be and side ways 1 & 1/4 inches! This is according to the hitch makers install instructions ! Lawyer said I could sue and win but the case would cost far more than we would get because of legal fees etc.. So unless you know the installer yourself, NEVER assume that just because a dealer or professional place did the install that it is right ! Sorry to rant on your thread ! BY THE WAY we pass that RV dealer every time we go to Florida on I-65 and its still there . Just an hour +- south of the TN. line .So BEWARE ! Jim