mine doesn't slip, maybe try more pressure on the clamp.

but what is with the tiny boom adaptor u get with powerex, just got another boom and it doesn't fit. Now i have to make one out of an old hose coz i refuse to pay $29 for a piece of plastic (what a rip)or i'm just a tight old bastard

I use one of those $29 bits of rubber (not plastic) on my skinny and it's great. No slippage, ever, and not much clamp pressure required either. However a piece of hose might be good, but is the buggarizing about worth the trouble? On my boom clamp on the booms for my big sails I have slipped a piece of innertube over the flexy hinge bit that bears on the sail side of the mast - works a treat.

i'm always up for a bit of buggarizing, especially seeing as there is F.A. else to do at the mo.

I'm sharpening the knife and the mountain bike inner tube is going to get it.[}:)]

Thanks for the tip