I marked each hole starting from the middle going outwards. As you get closer to the edge of the gear piece, it gets harder it is to control. The gear piece tries to jump out of the bracket and sometimes it dislodges itself from the bracket.
Every gear piece is like that, the outer holes are unstable and cause it to dislodge from the bracket and mess up the sketch, you need a super steady hand to control it. I was wondering, couldn't they just put a flange on the outside edge to stop the gear piece from dislodging itself. I don't swear very often but I let out a few swear words.
"Frack your garden you piece of shit", something like that.