I've looked at the lines and reserve tanks and they seemed fine (had my 6" of vacuum at the fitting to the booster.

I'll have to find a consistent vacuum source to check the booster. I have one of the hand units and I tried to pump up the booster but after 5 minutes I was only up to ~10" of vacuum. Not enough volume in that little pump.

I've seen the electric pumps, they're pretty expensive but I guess fixing the front of the car due to an accident would cost more!!