In reply to Mick Ryan - UKClimbing.com:
Dammit, someones beaten me to it! Ask any of my climbing partners and they'll tell you I've been threatening to design and make a pair of these on and off for the last 20 years. The neck's not getting any better and I almost went into the shed to make some (Roobarb and Custard style) a couple of months ago after an extended belay session.
It'll be no fun making them now though, cos you can just go and buy some :/
Rich