Hi.
The blades are ok from China, but the pitch in them is not brilliant.

I've got all alloy upgrades on my CX2 and there is not enough pitch in the blades to lift the extra weight. I have to use the xtreme blades.

https://www.ushobbysupply.com/index....a1b44a2ad308a0

http://www.boomtownhobbies.com/category_s/9.htm

If you have a stock CX2 the blades from China are ok