[Loz]

I have a Scottoiler on my 999S, fitted by the dealer (as I'm a numpty). It's not the large touring version reservoir, just the little one, strapped to the frame - you can just see it through the vent in the side panel, next to your knee when sitting on the bike, where the two fasteners are.
It looks a straightforward proposition to fit (for non-numpties) and it keeps the chain in damned good nick, but leads to filthy back wheel syndrome.
I recommend it.

[Edited on 3-11-2005 by Loz]