I've just done mine with a newly-acquired hanger-alignment tool. I'd hung on buying one as it looked perfectly straight to the eye but it was actually out quite a bit on both the X- and Y-axis. Someone on here posted a link to a YT video where it said it often manifests itself with problems shifting into the highest or lowest gears, which matched mine (and this OP's) symptoms. Definitely worth getting/borrowing one if normal fettling fails to provide the desired results.
