I had the airline through all the pipes when the rack was off, seemed to flow too good to be restricted, but they are the only remaining original part atm. I think if the pipes were restricting flow then the steering wouldn't be so smooth. Maybe something as simple as an airlock now, i'm really hoping so tbh

I'll give Ford a ring in the morning again see if they have any other advice, if not it looks like bonfire night in coming early to Liverpool, I'll let you do the honors of lighting it mate