I’m cleaning up my Super Speed and thought I’d check the infinity stops. I don’t have a screwdriver small enough. Even the drug store eyeglasses repair kit drivers are too big. Can anyone recommend one that’s a proper fit? Might as well get the right one while I’m getting one.

I use the 1.8mm slot in this Stanley set.
https://www.amazon.com/Stanley-6-Piece-Jewelers-Precision-Screwdriver/dp/B00002X29G/ref=sr_1_20?dchild=1&keywords=jewelers+screwdriver&qid=1605387480&sr=8-20

But that set doesn't have a 1.8mm. It has 1.4, 2.0,2.4, etc. See link you provided.

I have 2 of these sets the older one has 1.4, 1.8, 2.3, 3.0.
The newer set has 1.4, 2, 2.4, 3.0.
.1mm=.003937 inch; .2mm = .007874 inch.
My digital caliper shows the bottom side of the stop screw hole to be 1.54mm and the top to be 1.72mm.