Hi
My next challenge:
The rear brake fluid reservoir empties rapidly while the front one overflows...

I assume it is the seals on the pistons?
I see on toyodiy site that there is a CYLINDER KIT, BRAKE MASTER: part# 04493-60030 is that the right thing to order?
Then... Is it a complicated job to replace? This time I'm doing my home work before I open the tool box...