Hi Swedewheeler,
No issues whatsoever with the HD compensator, I always kept it lubricated with JCB high pressure blue grease. Which after inspecting the internals was doing a sterling job as there is no wear or discolouration on any of the parts. It did take an awful lot of cleaning out though.
Back in 2014 I removed all the exhaust baffles but kept the cats in and fitted the G56 air filter.
This allowed the engine to breathe so have not had any issues with pinking or running too hot since then.
