So,
Dinan has cut their Tune to 1200-1400 up through stage 5.
If you want a reliable tune that may not have the most HP as aftermarket, but has been dynoed and tested, here is your opportunity.
There is a stage 6 for the F10 as well, which means you need Alphina blade sized turbos, but not advertised.
https://www.dinancars.com/products/?...bodytype=Sedan