Doctor Diff Master Cylinder

Do you have an issue, or just preventive maint ?
None (?) of Toyota, Nissan, alum masters are anodized, and last for decades/mega miles .

Cass (DrDiff) asked me to email, as he was too busy for the phone.
My pedal went to the floor when I drove for the first time this year on Tuesday.
But if I pump it five five times then I had some braking.
I could feel the drop down like when you have a blown out brake line, but there were no leaks on the ground when I pulled over and looked.