I went out yesterday to shop for the MIL so I tried gear changes between 5,000 to 6,000 rpm on the A14. My car has no rev hang so the fix works.

My long term mpg is as per this thread & inline with the handbook.

I don't normally drive at those revs but the shift was slick and clean, if anything better than at say 3 to 4k .

I just realised I have never hit the rev limiter in the 3.7 whereas on the S1 I did occasionally. Will have to try harder.

JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger