This is a brief tutorial on how to balance the blades on a small quadcopter.
I got the idea from the Flite Test guys.
Larger quads can also be done like this but I accept no responsibility for injuries if you get it wrong. If you use this method BE CAREFULL!!
I use this method for larger quads also but before doing anything else I rotate the prop a little on the motor untill I get the least vibration.
Links below are for this quad and the V212 which supersedes it.
Also for batteries and upgrade props.
V949 Quad
http://www.banggood.com/Wholesale-WLtoys-V949-Beetle-RC-Quadcopter-Mini-UFO-RTF-p-49730.html?p=XA1804094280201211ON
V212 Quad
http://www.banggood.com/Wholesale-WLtoys-V949-Upgraded-V212-2_4G-6-Axis-RC-Quadcopter-RTF-Mode-2-p-68517.html?p=XA1804094280201211ON
V949 BNF
http://www.banggood.com/Wholesale-WLtoys-V949-Beetle-RC-Quadcopter-Mini-UFO-BNF-p-57271.html?p=XA1804094280201211ON
Batteries
http://www.banggood.com/Wholesale-5-X-Tigers-1S-3_7V-600mAh-2_1Wh-15C-LiPo-Battery-EFLB5001S-p-47835.html?p=XA1804094280201211ON
GWS Props Orange
http://www.banggood.com/Wholesale-GWS-EP-5443-Orange-Propeller-CW+CCW-For-V929-V949-Quadcopter-p-64889.html?p=XA1804094280201211ON
GWS Props Black
http://www.banggood.com/Wholesale-GWS-EP-5443-Black-Propeller-Blade-CW+CCW-For-MQX-V929-V949-Quadcopter-p-65328.html?p=XA1804094280201211ON