the next thing i would try is a gunsons easy bleed kit the type that connects to your car tyre valve for air pressure they are a good bit of kit imo.
http://www.ebay.co.uk/itm/Gunson-Eezible...faf&_uhb=1
http://www.ebay.co.uk/itm/Gunson-Eezible...faf&_uhb=1