http://www.jaxkayakfishing.com/phpBB/topic35662.html
Well sort of anyways. Today, technically yesterday, I was struggling to balance my stealth on my cheapo cart and was having a bitching time doing it. The hassle and maneuvering of it all lead me to search the web for simple, cheaper solutions to my cart dilemma when I stumbled upon this. The mod should help with dragging your yak across softer sand if you don't have larger wheels. I've yet to test it, but this is what I can tell from the post anyways.
I hope this helps someone.