Increase cap on max Shape Key value?

I had a plan of developing a sort of “point cache” utility for the engine that only imports shape key animation. Essentially, it means I’d give each mesh vertex 3 shape keys, each moving it 1 unit on x,y,and z axes. Then I’d be able to keyframe the movement of every vertex as shape key animation, by combining values of those three keys. All by script of course. The problem is, while shape key animation format I work with can store any float value as shape key value, Blender does not allow giving shape key a value above 10. Can I increase that cap, somewhere in the settings maybe?