Ultimate hard 3D blade for your 600!Ladies and gentlemen, the Align 600D night blades! These blades are truely amazing for hard 3D! I broke mine so I got a set of the standard Align 600D blades thinking they would be even lighter (no lights or battery inside), nope, the night blades are 2g each lighter than the standard Align 600D's which are light blades anyway! I also have a set of Radix, which are like bricks compared to the Align 600D night blades. Its not just the lightness of them its the response and climb rate!You have to try them if you haven't already, they are a bit expensive but well worth it.60% of the time, it works every time!