No,,,only slotted screw that turns left and right and very touchy. We'll try a little longer to see if I can fine tune and if not,,,we'll put another in. Thank you for the in formation.
I think I have the same style thermostat in my V-63.  Just one slotted screw and i don't see any markings on it.  I have it about halfway and the soda on the top gets between 32-34 degrees when I put a thermometer in it, after opening.
I have just been doing trial and error.  Let me know if you come up with anything.