I have noticed that the dolly that came as part of the outback fishing option is impacting the boat.
It would appear that the engineer folks at Hobie diddn't take into consideration that the hull is rounded and the dolly support is flat.
The hull thus is being crushed between the post holes. I have already stopped using this dolly, but I will be interested in what Hobie and the warranty folks have to say.
The hull is depressed by over an inch.
I don't think this is what Hobie had in mind.
Check your boats.
If you go the this link, http://www.geocities.com/questmodshop/
you will see how these folks say you can build two different style carts. For the one that uses the scupper holes, they suggest using extra long posts, so the ends don't rub on the inside of the scuppers. For the one that straps on, they suggest using pipe insulation to protect the bottom of the yak. I feel it's best, as mentioned by Noalias, to use the insulation on either model. Also as Noalias mentioned, they say to use pneumatic tires.
Hope this helps.