I finally flew my Brison 2.4 today.

Ambient Temp: 62°
Gas: CITGO 92 Premium
Oil: Bel-Ray H1R Synthetic 2-Stroke Racing Oil
Mix: 80:1 (1.6 oz/gallon)
Prop: Master Airscrew Classic 18x10
Tach: New TNC

First Flight: 8200 rpm static
Second Flight: 8300 rpm static
Third Flight: 8400 rpm static

The MA 18x10 prop is too small. I will try a 19x10 and a 20x10 prop next.