I have never heard before that there were any sidepin wipers but after searching in the board, it makes sense to me. I thought that the owner before has changed the one blade wiper against a twin blade and the second is now missing. Why? Cause somebdoy has managed the single blade direct on the arm

in other words direct on the main pin
I don´t know how to get this off. Any suggestions about here?
It seems to me, that the pin is drilled through the blade, but it also seems to be stock... no damage or work could be seen.
