Fantastic Daniel - love the updates!
I think, toggling on / launching a dial and then either clicking a tool or clicking away works best for me.
But, you took the sticky challenge and succeeded - nice!
The auto radius works just fine as well.
Played a little bit with it - two suggestions - maybe already on your list..?
1. option to rotate the complete dial in the prefs: maybe, I have everything set, but would like to have the tools start at 9 o'clock instead of 3 o'clock
2. export/import - presets: easily switch between various saved presets e.g. via a dropdown in the prefs, like having one for modelling, one for animating etc. If those will be saved as text files somewhere, they could be modified by the user to achieve the offset / reordering for (1) as well, if (1) would be difficult to implement in the UI. ...maybe even have (an option for) a dropdown icon just above the dial to change presets without opening the prefs. ;)
Thanks!