@
CaesarVis I have the PZ30 and have the same fuel mixture screw. Do NOT buy the Motion Pro D-Shape carb tool from Amazon it won't fit it's too big.
I ended up buying
this but NzBrake's ebay kit version is even better. I use a small flexible screwdriver extension from Harbor Freight to reach it.
The main jet you put in won't affect the idle much. Factory fuel screw setting is 2 turns out on mine. Optimal is 1~3 turns anything else to get the highest idle RPM you should change out your slow jet.