Quick tip re the compensator as an alternative to the boroscope - check you have an access hole about 1.5" diameter in the bell housing the compensator lives in ( mentioned previously ) underneath behind the engine at the lowest part - might need front wheels on ramps if you are not agile
If you do have this access , rub your find gently round the inside surface - if you have a centa compensator with rubber drive pieces at 10K miles there will be fine rubber dust in the crud on the end of your finger , unless it has had a recent exchange one fitted and they fitter did a good clean up job.
If there is rubber debris any larger than dust be careful how you go and assess future options - The default Morgan route would be to fit new rubbers, gaining access by taking the engine out or go the highly recommended Phil Bleazy route which gives you the future option of changing the compensator rubbers without taking the engine out - have to do it first time of course.
With the older units I would expect there to be just oil / grease in there.
