I installed a Blue Ox bedsaver on my Curt 20K roller hitch. It has a bit of adjustability, depending on how high you mount it. Mine is about as high as will fit due to the curvature of the hitch. I tend to back up till the king pin is over the bed saver and then lower it an inch or two so it allows the hitch head to carry the trailer load while hitching. I have bumped it a time or two if I get the king pin too low. So far, and this is our second 5th wheel, no drops yet but it is cheap insurance IMHO.
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To install the bed saver, 4 holes have to be drilled into the hitch for the attachment bolts. Some hitches use current bolts/holes, to connect the bed saver. The bolts, washers and nuts came with the Blue Ox. Not at all a difficult install, if you have a drill and correct sized drill bits.
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