...I decided to also add a new thread with a photo of the bore tooling marks I noted with my SP101 since I added one much later in my previous thread and didn’t want to run the risk of having it be missed. You can see the marks running length wise some dotted (about 4:45 o’clock). A small pointed wooden toothpick catches the mark line slightly.
...here is Pic of SP101 tooling groove marks
Linear Mode
