2 Days Later
Well...it has been 2 days and I can say that my mileage has increased for sure. I will post figures once I go through a complete tank.
The engine is much smoother, and there is no hesitation.
I'm not sure about the air filter setup, it may not be breathing properly, but I'll give it a few more days to be sure. If it doesn't change then I'll go back to the normal style filter to see if that makes a difference.
I put a valve cleaner in this morning Luqui Moly's Ventil Sauber (valve clean) which made a difference right away.