Aaah I see.
Ok just to confirm...
To top up the tanks, under the brass fittings that have the hose pipes on and fill them up (until fluid comes out)
And then bleed them as above.
It's starting to make sense.
The pumps I have, they seem quite big compared to other 'black magic' etc 4pump installs. Are they fairly decent, or are you better off with 4 smaller pumps?