Last night I posted a question from Tal, a Toika owner who was stumped by a loom part.
Today, I'm happy to say that Birgith has commented and cleared up the mystery. Wiebke from versponnen-verwebt also answered in German, but the Google translator left out a few key words from its translation. Thanks to both of you!!!
This piece of the loom
does help prevent the beater from hitting the castle as you can see in this photo of the Jaana loom from the Toika website.
This photo shows the bumper on the beater of a Toika Eeva. Thanks Wiebke for the picture!
Thanks for solving the mystery and happy weaving to Tal!!