I have been frustrated with the inconsistency of the Flow keyboard mouse switch. Having [1,2,3] on the keyboard for machine is great, but it is very inconsistent and sometimes switches when not controlled to do so. Adding an additional ability to make your own hotkey to switch machines would be more ideal. SHIFT+CTRL+Drag or even SHIFT+CTRL+ALT+Drag instead would be much better protection against accidental switches. I noticed that often when i go to copy and paste, it switches on me. For now I am going to have to use an external USB switch, which is annoying because this is like 98% of the way to being great, but the last 2% is so annoying I cant bear it anymore. It constantly makes copy and pasting a problem. Please expand flow to have custom action controls and all will be much better!