it has been awhile, so here is an update.. harbor freight choks work well. Now for the complaints not with the choks but with the camper. blown tire less then 300 miles in. warranty good. need a new tv or tv stand they don't match, lastly and hopefully someone else has this problem, were I have been driving the bikes up the ramp it appears and feels like the center of the ramp has a valley in it as if the weight of the bikes is compressing whatever the ramp is made of.. do I have a junk ramp door or are they just this poorly constructed dealer is looking into it.