Is this all there is to it

[spydercoach]

if this is all there is to it why do they want 250 to do it? What holds the wheel on and the belt tight if I remove the axle?

RT Hitch Installation Instructions

1- Use a floor jack to take the weight off the rear wheel
2- Remove the plastic cover on each side of the axle
3- Remove the cutter pin on the right side
4- Unbolt the axle and remove it completely
5- Remove the washers on each side and replace them with the side plates. Note there is a left and right side.
6- Re-install the axle and bolt it in place. Once this is done, insert the cutter pin and re-install the plastic cover on the nut
7- Bolt in place the U-Shape hitch using the hardware included in the box. Insert the bolt from the inside out and once it is bolted in place, install the plastic nut cover.
It is easier if the parking brake is not on.

 

[Lamonster]

Not sure who's hitch you're talking about but there's no need to pull the axle.
http://www.spyderlovers.com/forums/showthread.php?37974-RT-Hitch-removal-and-belt-adjustment

 

[bmwlarry]

I thought the $250 is for installing the electrical harness -- not just the physical hitch itself.