Wow nice! I will try to build it over the weekend.
However, that user interface for the probe and tune tools are really Kicad-ish - ass-backwards! Select a button in one window so that you can then click with it in another (schematic) window, instead of having the tools there on a specialized toolbar 
Yeah i am quite on the fence there, onone hand i suspect that in dual screen setups this could work quite well, and also on big High res (4K-ish) screenshot where you use both the windows side by side, on the other hand for peoples like me with a normal 20" HD display could be quite annoying i think and i suspect there are a lot of peoples in my conditions...
Anyway seen that this features is stil in developement i guess that now is the time to speak up so that the developers will fix the issue before it ends in a release the public will see (and then it will be notably more difficult to change)