Another quick note about bleeding with the 2-person method: Don't ever let the pedal go all the way to the floor. It causes the master cylinder piston to go beyond its normal travel range. When it does, it's much more likely to encounter dirt, dust, and even rust. Obviously these impurities wreak havok with the seals.
Ask any professional tech... this is the reason that it's very common for vehicles which have had recent brake work to soon after require a new master cylinder.

Jeff Pierce

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Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F