Steve, nice work, as a fellow engine builder, but newbie CNC I have enjoyed following your progress. Some of the club members with blown engines are achieving 4 to 6 lbs of boost. You had mentioned making a pattern for the blower, but since it lends itself to simple draft it might as well be done CNC.
This is not meant to Hijack the thread, but for those interested:
Clem will be at the GoodGuys Nationals in Pleasanton in August with the Deltec, Lou Chenot will show his 1/6th Duesenburg and I will show my V8. The word is that Jim Moyer will also show his 1/6th scale chevy.