Just realized my old brick spacing trick was causing issues
I used to eyeball the gaps between bricks instead of using a spacer. Stopped that last month and started measuring every course. Now my walls are straighter and the mortar use is more consistent. It takes a bit longer but the results speak for themselves.
How long did you eyeball bricks before switching? I did the same thing for ages, and my walls were always a bit wonky. @robins83 has a point about saving time later by being careful now. Measuring each course seems like a drag, but you really can't argue with straight lines and even mortar. It's one of those skills that feels basic but makes a huge difference. I'm glad you figured it out before it cost you more work.