Hi to you all. I took my crazy2fly and replaced the motors with TMotors MN3508-16. The Props are TMotor Carbon Fiber CF10X3.3. Im using TMotors T18A ESCs with a Multiwii 1.5 and a 3000 3s lipo. The problem is that I cant lift off. The frame was replace by a Tarot 650mn. Please help I love my Crazy2Fly and I tried the upgrade and I cant make it work. I can armed the motor but cant lift. Thank you for all the help and time.
Hi,
If you replace the frame for a Tarot 650mm, what’s left from your Crazy2Fly original frame ?
What exaclty happen when you try to lift your frame now ?
Looking to help you … 
It starts spinning and crash.
That’s not a lot of informations.
You need to be sure the Motor & Propeller rotation is right for all the motors, that the ESC’s are connected to the right pins as well.