I Geoff
Yeh i noticed those, good idea, no good for me tho i'm stuck in the late 60's foot fall isshews are my thang

I personally think the 'O' ring idea will last a lot longer than a year or so imho, they may stretch in the future but wont snap.. at the end of the day you can get a bag full for peanuts

All good fun tho innit.