RE: E-flite Ultimate 3D
I flew my Eflite Ultimate with the Himax 6.6:1 HA2025 (Park 400 equivalent) setup. It had plenty of power. Easy hovering, and an incredible sound that was, believe it or not, realistic!
You won't be disappointed with this setup (3 cells, Phoenix 25, Airtronics rx and servos).
Chris.