You can also use the tail blades, which is probably self-explanatory. They are cheaper as well...

Honestly, from what I have read and experienced, the CPv3 varies heli to heli. Some times you get a good one, sometimes not. If it flies from the factory, do not touch those gyro pots on the 3-in-1 board! They are a bear to get right.

I do not dispute that some of the CPv3s have crappy electronics, but the current 3-in-1 on my CPv3 holds every bit as well as the gyro on my Blade 400. No kidding. If you get a lemon, call Heli-Max. They have always given me awesome support.