Hey first time rebuilding a car and I'm in the final stretch with fluids but I'm having trouble with my clutch I replaced it with a performance master cylinder and had to empty the whole system. Now that it's on the car in having trouble filling it with brake fluid. Anyone know if my system of dumping it in and pumping the slave is flawed? It doesn't really seem to make much progress but I am getting airbubbles out the res. I read that sometimes the master cylinder gets full of air and you need to fill it before putting it on the car is this true? putting it on is a bitch and I don't want to take it off if I don't have to. any info helps!