Hmmm interresting. Well I hope I'm wrong with suspecting the leakage into the Brake booster. As I said it has only gone down slightly in 9 or 10 months so it wouldnt be much. However I dont know where its going.

If it is indeed the MC, is it easy to tell from a visual inspection? Will it leak with pressure being applied to the brake? How would I test it?

Any diagrams or tutorials online?