I have a 91 CRX and had a failed master cylinder,the pedal goes right to the floor.Worn out seals in the M/C can be damaged by installing new pads,the caliper piston is pushed back to get thicker new pads to fit.Age is the primary reason it failed the brake job just tipped it over the edge.Did your rotors have a lip on the edge which was worse on one side?This could be caused by a sticking caliper which will damage your new rotors.

Mechanics do not want to scare people away with a huge bill so they never come back so they do a partial job knowing you will come back when the parts they did not replace fail.Fix on failure is the most expensive way to maintain a vehicle but mechanics need the customer to come back and customers do not want to spend $1000 just $300 four times.

http://www.partsamerica.com/ProductD...tnumber=M39780

It is important to "bench bleed" the M/C-the new unit I purchased had a kit with hoses and fittings.Attach the hoses to the M/C then put the ends into the M/C reservoir.Press the piston over and over until the fluid coming out of the M/C is free of bubbles.

You can bleed brakes yourself with a tool called a mightyvac,it sucks the fluid out with a hand pump and does not require an assistant.

http://www.harborfreight.com/cpi/cta...emnumber=39522