I don't see what's so bad about Jackson Racing's supercharger... it's the same Eaton screw used by Mercedes, right?
There's a simple reason why someone might be happy with 5 PSI: because going to 10 PSI costs three times as much.
I bet the Eaton blower can be hacked to give greater boost anyway, by messing with the pressure relief valve... of course, how long it runs without something breaking might be measured in weeks, or even in minutes...
