Bled the system again, this time with the engine off. First, I bled the bottom nipples and was surprised that air and old brake fluid came out of the nipples, especially when I have put nearly 2 litres of new fluid through. I then bled the top nipples and then top and bottom again. Little difference in pedal feel. Guys, I'm just going to get somebody around with more knowledge to fix this, I've had enough of dicking around with this for 8 days.