Howdy all, I've noticed recently my brake pedal is getting spongey when sitting at thw lights. Starts firm, then slowly travels toward the floor. After inspection, i found no leaks, so can only assume the master cylinder is shot. This is the MC thats in the car at the moment. Just want to check its the right one before ordering a replacement. Car is manual drums all round with no P/S or A/C. Cheers!