ST30B I tend to do 15/16g - 30s usually hits the spot.
I’m not a fan of frequent, or large grind adjustments, but when you have to do it, being able to quickly look at your grinder without disassembly/counting clicks (as with the Aergrind) makes life much easier (I do have grinders that adjust underneath and find them fine for drip/pour over as you don’t need to adjust that much). I very rarely adjust my Lido 2/E grinders, the newer Lido OG looks like an improvement, but sounds like more than you want to spend.
How much weight are you getting out? Grinding finer to lose sharp/tart acidity, or extending the brew ratio for more output is the way I’d go.
500g bag/16g dose is 31 shots…I’d be aiming for 3-5 shots to get in the ball-park.