ControlPoint.Weight range

Hey experts,
is there a way to get the range of possible weight values? I need to translate the weight to a range of 0 to 3.
The default range in Rhino’s command “Weight” is from 0.1 to 10.0, but this range can be changed.
In the following image i’m talking about 0.001 to 20.0

Thanks in Advance,