How is this done?

[Clyde Hollinger]

Friends:

I'd like the answer to this question before I get myself in trouble.  A
few old uprights have a sharp pin in the bottom of each sticker that
fits into a hole on top of each key.  There is no sticker tongue or
sticker tongue flange.

Getting the action out of the piano looks easy enough.  Getting it back
in might be a different story.  Do I need to remove all the keys and
slip them back in place one at a time?  Can someone who is familiar with
this setup tell me a faster way?  Thanks!

Clyde Hollinger, RPT
Lititz, PA