Ken,
I am very surprised by these comments. The NMPRA, and AMA adopted the EVO .46 into AMA 424 this year and after two seasons of testing it was proven that it in fact was not superior to the TT 40, when using the APC 9x6 prop and the 1 pc muffler.
Rather than banning a particular motor, it would have been prudent to insist on the usage of one propeller, the APC 9x6 that is approved for AMA 424.
Hopefully, Club 40 finds a direction.
DK