Or if you can afford the extra texture space instead, you could make the "orb" of just a plane with circular alpha map and spend all the extra tris in the critter inside. You would then make the "orb" plane face the camera at all times so that it'd appear as an actual orb. Though you really need to sacrifice big chunk of…
You're not pasting that properly, Tahakitan. type: [ url ] linkoftheimage [ / url ] minus all the spaces of course: You're wasting a lot of triangles. You could lose a loop on all the wheels, and a bunch of loops on top of the hood and at the rear/top can go as well.
Why not making a basic planar mapping from the side for the blade ? all the overllapped faces would have been nice. Because the blade is just a gradient map :s (in fact it's also possible to align all the blade's vertices in 0 in U axis.