would it be possible to perhaps add a function where you can set a double keybind for a control?

with that I mean if you for example try to toggle the flying ability of an item, it'd probably require the "F" keybind to be pressed. now you can relocate the keybind, but if you've alot of mods installed you'll run into the problem that you're running out of usable keybinds.

but what if you're able to set 2 keybindings for that control? so instead of the keybind to be on "F" you could set it to "CTRL+F" so it'll only toggle the control if you press "CTRL+F"

you'd be able to choose what keybindings need to be pressed for all the controls, and this way you'll be able to keep more controls on your standard keybindings, but you've to press an additional key to activate them.

This is already a feature. Mod dev's just need to implement our API.

Right now Tinkers Construct and PneumaticCraft implement it.