I’ve never got on with thumb rests. I’ve often wished I could as I don’t have the strongest hands I could wish for. I’ve always enjoyed the comments and exchanges on the Dolmetsch site regarding thumb rests though. They might be of interest to you, Stan, if you decide to experiment with the thing.
https://www.dolmetsch.com/recorderthumbrest.htm
I do hope your recorder gives you a lot of fun. 🙂