Kuduae,

Thank you again.

As they, the rounded and square backs, are without a formal name I will just refer to them in the future as either an "Altdeutsche Backe" = old German cheek-piece or "Verlaufende Deutsche Backe" = running out German cheek-piece with either a round or square back. It's also nice to have the German term (in German) used for the Bavarian cheek-piece. I appreciate your help with this.

Regards,

Mark