well I had a slow leak of brake fluid so I decided to change the gaskets on the bottom of the resevior. well all the pushing I was doing caused a bigger leak at the interface of the Master cylinder and brake booster! My low fluid light comes on every few days. Is it worth just getting a new gasket at the interface point or should I source a used unit altogether? (or maybe even new) Should I not be driving?

 

I drove for four months on a leaky Master Cylinder,not the best thing but as long as you have pressure you should be fine. Dont buy a used unit either you will just end up with the same prob go with a new one.