John at Revs couldn't find any obvious reason for the seal failure, but mentined that some times inactivity is the worst thing for a shock, as the seal can stick to the damper rod over time and then tear or turn when it's used again.
Anyway - it's all in A1 condition now (photos will follow tomorrow) and I'm asking £170 delivered or £160 cash if you can either collect from Sheffield or meet up at Griff's open day in September.
<edit> - as promised, photos below.


