good morning PF, here's my problem;

I have a mk4 escort estate that has had RS turbo calipers put onto it. Recently I fitted braided brake lines and since then, the brakes just basically haven't worked! I have pressure-bled and manually bled them numerous times, so has two professional garages. The master cylinder has been changed twice and still no results. When I fitted the lines, I pushed all the fluid out of the system and put new fluid in.

The brakes worked fine before I fitted the braided lines. There are no leaks, no pistons have popped out but the pedel travels much to far and with no proper feel to the brakes. The second garage I used said that only half the system (N/S/F and O/S/R brakes) is working but this may just be a result of a primary problem.

Could I need a bigger master cylinder? If so, what could I use (sierra 2.0L master cylinder etc?).

Please help anyone! the car is undrivable at the moment