just bought a 2004 v8 xlt with a class 2 frame mounted hitch. I need to mount a 80 pound mobility scooter carrier and the scooter weighs about 250 pounds. Do I go by the tongue weight to determine if the class 2 hitch will be heavy enough since the towing weight really doesn't come into play? I will also need to use a 1.25 to 2" adapter to mount the carrier. Will the class 2 be strong enough? How hard would it be to mount a class 3 hitch to the explorer? is it as simple as unbolting the six bolts on the frame or are there hidden bolts I can't see behind the spare tire? How hard is it to remove the bumper,looks like it will also have to come off? thanks!!