That's an interesting idea. I was thinking of maybe some sort of polyethylene friendly silicone lubricant or something but your idea sounds wonderfully simple and effective. It's too bad that Hobie didn't have some sort of sleeve insert for the mast mount that could accommodate the mast. That way it could be easily replaced with a new one should there be any wear and tear. My over active imagination was wondering if I could design and fabricate something along those lines that could mate up with a modified mast base and completely eliminate the wear on the plastic hull. Maybe something with an easily lubed bearing.
Hmmmmm.....the wheels just keep on turnng.