The Scottoiler was fitted to my bike when I got it and after 11,000 km I have never had to touch the chain. I didn't like the way the outlet met the chain though. It always needed adjusting. I checked out the Scottoiler site (www.scottoiler.com) and saw they had a new method for fixing the end piece on, so ordered some new tube and the end piece, which now looks like this and is far more rigid:
I also installed the Givi V46 interior light kit for the top box:
It has a lid switch plus you can manually turn it on and off. It had to be assembled, which was fiddly and a right pain!