Haha, I'm afraid I don't know of about the 3 legged cat. But then I don't really go to the Green Parrot
Always surprised how many people I meet on the net have been down here surfing at some point. Ironically, even though I live here I (whisper it) Don't surf. Which is total heresy and goes to show how out of character me getting Bocks is really..
I'm not worryed about the increased pressure on a smaller surface area, thats a bridge to cross later prehaps, but I agree with what you are saying about it getting in the joints, that was my main worry too..
However, I found this on
http://www.powerisers.de/english/detail-faqs-eng.html The degree of wear also depends to a great extent on the surface on which the Poweriser® is used. On sand, grass or smooth undersurfaces, the degree of wear will be lower than on paved or rough surfaces.
I think I may have this idea too firmly set in my head already
However, on a slightly related question, since beaches are generally wet, are Bocks prone to rust in any way? / Do they function ok when wet?