Thanks a lot Dave! I do understand your hestitation and really appriciate it. And the condition is not very important as I will, after modification, tidy it all up and (re-)nickelplate it so it looks original. The goal is to make my mod look as period as possible. Most probably such a mod might even have been available/done in the twenties too.
By the way, if for some reason I will not need it after all I will return it to you of course.
The reason for my late reply is that I just got back from a two weeks holiday near Hastings. We went to see the Pioneerrun and I spoke to quite a few Scott owners there! And nice to see that amongst the first bikes to arrive in Brighton was a Scott!
Thanks again Dave!