Heli-Max MX450 XS-0.jpg 36.9 KB · Views: 44 This is the 3D varient for 3.5, you'll notice an extreme improvement in flight. This is a really fun heli to fly! Expect more! This variant requires: Heli-Max MX450 XS from Expansion Pack 4 Reactions: dprue and biggboyzztoyzz