Having the same problem on our focus. New clutch and slave cylinder last week and every now and then clutch travels to floor and and no gears (engine usually stalls). Waiting to take car back to garage as another mechanic has told me that the system needs to be back bled to eliminate any air present. But as you say Scrunchee yours was reverse bled so what next??? Thinking of bleeding system myself. Can anyone here describe how to reverse bleed and best tools to use. When you DIY you know its done right (Hopefully). | 
