Weltmeister accordion, how to remove keys for adjustment.

[ArtMustel]

Hello, a friend of mine has a Weltmeister accordion with several uneven keys and I was going to try to fix them but I noticed this instrument has not the usual long wires that hold keys in place, but instead individual plastic pins on every key that i think must be pulled in order to get the key off. I just want to ask before doing it wrong, is that the procedure to remove keys in this brand of accordion? Thank you!

 

[ArtMustel]

Never mind, I just removed one of those pins and the key popped out. I don't know if this system is used by other manufacturers but so far i knew only the long spindles, one for black and one for white keys. This individual pin system seems good to remove one or a few keys but if one needs to remove all them then it would take extra work...