Hi OBH, there is no doubt that you need a rather understanding Historic Plates registrar on your side. The responsibilities are quite significant - as you guys would know, you never have any problems with any Insurance Company "unless you have a problem" !
Before attempting to make a claim, you have to ensure that all i's have been dotted, and all the t's are crossed - and that process needs to be commenced right from the word 'go' until the time comes to lodge a claim - whenever that may happen to be because if there is any loophole, the Insurance Company will find it.....and, at that time, that's the last thing you want.So, EVERYTHING has got to be RIGHT !
Lukas, you also need to keep in mind that any topklasse organized event does not attract the privilege of "being part of an organized Club event" and therefore, by rights, any club plate registrar would not give you permission to drive your car to an event that we may organize. There is a good chance that we may be able to overcome this restriction by endeavouring to include any event we may organize to be sanctioned by the Club, but an approach would have to be made to the events director for inclusion in the club's events diary and to obtain their permission. Being one of the S-Class registrars, this may be of some assistance to obtain the Club's permission. Remember, we are only talking about cars with historic plates.
To second Michel's advice - I do think that 6.9s need to be driven - the more one drives them, the better they perform. Looking forward to hearing further from you if and when you make further progress with your projects. Regards Styria