Hi mate, I'm taking it in to PMW at Chelmsford tomorrow. I've done all the obvious checks and replaced various sensors but my confidence doesn't extend to replacing pressure converters + vac pipes or anything more tricky, so we'll see what they find.
My problem sounds similar to Superflyguy but have had a gradual power loss over 3 months ABOVE 3000 revs at full throttle. Over a certain stretch where it would previously accelerate up to 87, it will now only reach 74, but kept below 3000 revs and part throttle you wouldn't know there was a problem.
Hopefully I'll have it sorted shortly - will definitely get it along to Santa Pod, might see you there next month!