Reduce operator fatigue with the Center of Gravity Crystal Sky Attachment, made from Aerospace 6061 Billet Aluminum. The CG attachment is very light, weighing 156 grams. Securely mounts Crystal Sky to the controller. Quickly install or remove in under 1 minute. The quick-release knob allows for easy adjustment, no tools needed. Use laser engraved index for marking the perfect balance location for you or other operators. Compatible with all Crystal Sky versions and Autel Evo 1 & 2. Store in bottom of original GPC case, after quick removal of index bar assembly. NOTE: DJI CrystalSky Bracket, CrystalSky and Autel Remote Controller is not included.