Continuation of: https://www.reddit.com/r/MechanicAdvice/comments/12hweim/update_07_mazda_3_found_the_cause_for_the_p0016/

So the code came back, and this time, the camshaft is detected to be 30 degrees off, even with the valve cover adjusted. After looking at several reference photos, I’ve concluded that the trigger wheel on the camshaft has spun, causing the false misalignment detection. I’m able to clock the trigger wheel by tapping it with a dead blow, but I need a way to prevent it from spinning. One aftermarket cam has the trigger wheel tack welded to the camshaft. Another has the entire circumference welded. I want to get a second opinion before committing to pulling out the welder. A replacement camshaft is not in my budget right now, so this is something I’m doing as a long term temporary solution until I can afford to cam the engine.