segway project: where to get torsion springs (around 20-40ft/lbs)

[dfukuba]

So i've been building my own segway for a bit now, and i'm making a lean steer mechanism for my steering using a torsion spring. I'm trying to look for places where i can get some pretty strong torsion springs, but the most powerful ones i can find are around 40in/lbs, which isn't nearly enough.

Here are pic of the segway and lean steer cad.

anyone know of a good place to get something like this? or maybe even a better design for the steering.


--danny
(for the lean steer cad, there is a stop at the top in between the two fingers comming from the spring. the blue cams are attached to the shaft, so only one side of the spring is extended at a time.)