Nice update @firewolfy, I am curious to see what prices on v2.0 will be.
I did something similar with my 92mm ID-Cooling fan. The blades extended out slightly from the frame so they were hitting on the bottom of the case when installed and making a horrible racket. I have a silicon gasket from a 92mm Noiseblocker fan and installed that between the case and the fan. Got rid of the racket and I am guessing also helped with turbulence.
Good luck with future versions of the case.
firewolfy, I was thinking about the same thing when I first read the updates: if you can supply a rubber gasket, it would be a better solution than a metal riser. Probably less cost to you, and definitely less overall noise...