[SpudRider]

Originally Posted by FTEY

Based on your guess and also the blown up diagram from katflap, i think you got it....in a way, it's actually hidden.
So I should be sticking the screwdriver into this hole shown in the yellow arrow.

Is the hole covered by a brass cap? If so, you need to remove the cap first. Have you verified there is a screw inside the hole? If so, that screw is very likely the PMS.

You do adjust the PMS with a small screwdriver. You first need to discover the present setting of the PMS. To do so, slowly tighten the PMS, counting the number of quarter turns until it lightly touches bottom. Don't overtighten the PMS. You merely want to count the number of turns until it lightly touches bottom. For example, you might need to turn the PMS 2-1/4 turns until it lightly touches bottom.

After you record the number of turns needed, loosen the PMS counter-clockwise until you return it to the initial position. Report back, and I will tell you next step.