Limit Mates - Preference point, Nesting, snapping?

I'm creating a limit mate between 2 planes, say, 30" maxmovement. Is there a way to have the part 'snap' to the 15"(midpoint), yet be able to move past it, in a limit mate? (Kind oflike an EQ lever on a stereo)

Thank you!SolidworksAssemblies