Wally, thanks for your comments. I found no evidence of shops making musical instruments in Pennsylvania making zitters. There were some violin makers and of course by 1839 C.F. Martin was making guitars in Nazareth, PA. Of course, the absence of evidence doesn't mean it didn't happen, only that there was evidence that it did. Henry Mercer mentions one builder, but he made bowed zitters.
As to the linguistic issue, scheiße is the German word for sh*t. Scheit in the 16th century was log or piece of wood. I think that is still the translation today according to my German friends.
You are in good company in thinking scheitholt "has been established in dulcimer history too long to just kill off." That was Ralph Lee Smith's attitude as well. I argued with him that we should be precise and correct in identifying these instruments that are not scheitholts as what they were called "back in the day," namely zitters.
Ken
"The dulcimer sings a sweet song."
