I like the grease idea. The first thing that came to mind would be to cut a section of inner-tube (bicycle, or otherwise) to fit that space.
Of course, that might be a horrible idea. if the rubber degrades too quickly, you'll be left with some slop there, which could be bad. I hope someone here will say so if that's the case. ('cause I'd likely try it anyway...)
Of course, that might be a horrible idea. if the rubber degrades too quickly, you'll be left with some slop there, which could be bad. I hope someone here will say so if that's the case. ('cause I'd likely try it anyway...)