Guys need to adjust my stop screw is it 3mm or 2.5mm driver needed?

Unable to see so doing it by feel hence the question 

2.5mm on both the GTB's I've adjusted

Thanks dude an winding out brings boost in earlier?

Yeah

 

Have fun,lol!!!! 

 

Pig of a job 

oh goody lol got a ball ended 2.5mm driver from my rc cars 

Don't really know what stop screw alters if I'm honest, just know how to test/set using vcds.

 

Lengthening actuator arm deffo brings boost in earlier, but it's not something you do without checking boost logs and having map altered to suite.