A friend gave me this used brake booster for my girlfriend's bike.
I wasn't able to install it. I am not sure if my friend gave me all the parts, or if I am missing something.
The problem I find is that the part I labeled as "C" has a "lip" on only one side. If I install it with it pressing towards the v-brake, the v-brake arms won't move. If I install it the other way, the booster would come off...
What am I missing?