>>2928595
Yeah its got a screw but... youre tightening the screw against an angled surface if you dont set it to 0 so its a bit hit and miss at best.
>Lever
>Picrel
Posting this has gotten me curious and I had another go at it. Maybe soaking the machine in oil for months did help, i could pry the mechanism loose now the lever works. Still no idea what it does - heh.
'2' is towards the needle '1' is towards the handwheel.
It slides a spring loaded colar on a rod in the machine base. It might be acting on a cam. I'll post pictures of the actual mechanism later.