I am just now sitting down to install my Park 370 into my SOFA2 (yep, Son of Franken Axe 2).
Going with the 10-tooth pinion gear. Target headspeeds: 2250 - 2850 RPM
New Brushless Motor and ESC for my Axe installed! The ESC installed very neatly directly beneath the motor, and does not interfere with or bind up the canopy. Next step: solder up the Dean's connectors and test the motor / ESC. Looks like I may pick up the tail motor and ESC from my LHS this week...
Dang, I WISH the Axe could have been sold as a cheap $99 ARF. Then I could have bypassed the crummy radio, rcvr, e-board, and motors from the start...
In other news:
I energized my new TREX 450SEV2 systems yesterday for the first time, sans Gy401. Got the servos centered, next step install servo arms, ball links, etc.
Fired up the motor to a low speed with no main blades - nice. May have to back off the motor from the main gear slightly.