I adjust the carb on my Tanaka 47R engine quite often.
When I changed tire diameter, I adjusted the carb.
When I swapped from 50:1 two-stroke oil to Opti-2 100:1 ratio, I adjusted my carb. When I inadvertently put the wrong mix in, I adjusted the carb.
I USED to carry a screwdriver in my pants pocket to adjust my carb. I ALWAYS worry about jabbing myself, if I fall off my bike.
So now, I adjust my carb's "L" and "H" settings with the fingernail on my forefinger.
It's much safer, and hey, it works!