I have built my own but a few things I haven't done yet but are in the planning (go ahead and steal any ideas you want from me but understand If you make them better I will steal them back if you post them) 1.a intergrated ladder that is stored under the rack and pulls out and attaches to the rack and reaches the ground. 2.intergraded light housings for front sides and rear that protect the lights from trees as well as gear and such inside the rack. 3. (This one I have alredy done) hidden wiring routed through the tubes of the rack and terminated to a 4pin trailer harness (front, sides, rear, ground), for easy removal of the rack. So far I have about $125 invested in material and about 12hrs in design and fabrication.

Just My 2 cents Good luck!