smartshift - unclear documentation

[Ashark]

The documentation for smartshift is not very understandable.

In the example config I see the "torque" parameter, which is not documented at all. Is this an issue of documentation or the config having unexisting parameter?

Next thing is that the documented smartshift options include:

threshold
This is an optional integer field between 1-255 that defines the threshold required to change the SmartShift wheel to free-spin.

default_threshold
This is an optional integer field between 1-255 that defines the mouse's default threshold required to change the SmartShift wheel to free-spin.

How do they differ? What "default" means in this context? Maybe something like "applied for each host the mouse switches to"? Just guessing.

And how can I find out the "real default" value of threshold used by mouse when this/these option is/are not used?