No. It was intentional to set the max values of the spin boxes, but the default values should probably be more like length = .5in / 1.25cm width = .25in / .5cm. I think I cut and pasted the code to set the max spinbox values to the default for the settings.
No problem. I also looked at having the notch settings convert if one changes the units, but unless I refactor the preferences into one class it gets messy bouncing signals between the general prefs, pattern prefs, and a common class to connect the units combobox to the notch spinboxes. So for now if one changes the units, they probably have to change the default notch length and width as it may still have the value of the other units - if it hasn’t been limited to the max for the selected units. For most users probably not an a issue, unless one works in both pattern units, in which case I just thought of way to be able to save / load multiple “workspace” settings.