Scale x (and only x) following the instruction below:

For the original (non-OLED) model: scale x to 99.3% for a loose fit, 99.15% for an exact fit, and 99% for a tight fit

For the OLED model: scale x to 100.65% for a loose fit, 100.5% for an exact fit, and 100.35% for a tight fit

Print in PLA for the dimensional accuracy. Be sure to use brim and support (65 degrees everywhere will do). You may need to rotate it 45 degrees sideways to fit it on your bed. Remember you should scale x BEFORE rotating it.