/Well, er yes this?
*
http://www.amazon.co.uk/Kingston-Bra.../dp/B006K7OGZW
Ideal until you faint at the price! /q
Hehe!!
I've seen radiator tail extenders in various lengths (for a lot less:-) that use the same approach and I could hopefully find some big fo washers to put between the extenders and the underside of the worktop to do the job of the backnuts BUT will I get a seal between te extenders and the few mm of tap tail showing under the worktop?
Jim K