Hi,
I do not know if thsi is the right place to post this topic but I have my twin master cylnder (Girling) fitting that is leaking. Thsi is the oil feed form the reservior. I changed the fitting 3 times already (longer, shorter and now with a copper washer) but after a week i find a film of oil (very small) around the fitting. The master cylnder are teh 0.677 and 0.7 (if I am not mistaken) found in the standard floor mounted twin bias bar set up. The pipes are braided swaged ends

Can someone help out

Cheers

not a great help from me, but check if you do have the right tread..hydrolock should help if you only have a small gape.
check reservoirs, plastic one are craps and leak may comes from it.
cheers