I did some test sewing today, and since the feed dogs were no longer high on the front side, the Juki rode over the seam allowances perfectly. And silkily (ha!). A big thanks to Elbert from Juki and to the supportive people who responded here. Even before I had an answer from Elbert, my blood pressure was already going down.
If we share information, we will learn. Innov8R, I will be looking inside the bobbin case for that black clip!
hugs,
Charlotte