@Toffer901) So what happens when I change the value to 5 in the XML?
2)10% is the "normal default so you should not need to ctrl-click to get it. It should be the simple click. The others be the ones that need the extra key.
So it seems like suggestion needs more streamlining:
Clicking +/- adjusts value by whatever was defined in XML. It can be set to 10% or default 5%.
Ctrl clicking would always adjust value by 1%.
Shift clicking would set value to 0% (- button) or 100% (+ button).
I think this would be nicest way to do so.