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.
"Loonatic"..........although to be honest I drive my Roadster (where permitted) in the upper rev ranges and maybe that's helping to keep the little light off.
DaveW '05 Red Roadster S1 '16 Yellow (Not the only) Narrow AR GDI Plus 4
