I do all of my injections with slinpins, until it makes sense to go to a 3cc barrel due to total weekly volume.
And I use 30g 30-unit true slinpins when volume is low enough, like here daily. I did 20mg Tren Ace yesterday with one of these.
After that I will use 27-28g 100-unit/1cc EasyTouch for the eod type shots.