I put a delta bike hitch: http://www.gearshark.com/cgi-bin/s/s...%26estoreid%3D

and a wheel hitch: http://www.nashbar.com/profile.cfm?c...ype=&estoreid=

on a piece of 2x4 pressure treated lumber. It fits in the notches of my bed liner. I can pull the whole thing out in about 15 seconds.