VKB-SIM

I'm currently using the trigger of my left stick Kosmosima (button 1) to turn off Flight Assist in Elite Dangerous, with FA mode set to Hold. What I'd like to do is when the trigger is fully depressed (triggering button 2), FA is turned off until I fully depress the trigger again. That way I get the best of both worlds, FA in both Hold and Toggle modes, without having to change the game settings.

Basically: Button 1 functions as normal until Button 2 is pressed, at which point I can release the trigger but Button 1 will remain virtually depressed until Button 2 is pressed again.

Any thoughts? I can't seem to figure out how to do this in the configurator.

I'm not positive, but I think that might be logical function "Toggle""? As in press once, it treats as an 'activate function' (even when released), then releases only when you press again?
But I'm not 100% sure you can make it work the way you want.
EDIT - in below I might have the Physical buttons reversed...I can't remember if the first stage was Physical1 and second stage was Physical2, or vice versa on the Kosmosima. (I'm on a slightly old FW like 1.97 because everything has worked so I haven't changed anything since like Dec 2019.)

In Elite, FA is set to 'toggle' not hold. If Physical button 1 (shallow trigger) is set to a Logical "Button" (momentary)....nope, fails the sniff test already.

OK, so in Elite FA is set to require a 'hold'. Physical button 1 (shallow trigger) is set to a Logical Button (momentary), call it #1. You map this to the FA command. If you just press this one, hold a while, release, you are FA on and off briefly like you want.
Then you set Physical button 2 (the deep trigger) to Logical "Toggle", also call it Logical #1 though. So clicking thru the trigger presses (momentarily) Logic#1, then presses Logic#1 again and HOLDS it when you hit trigger 2. You might hear COVAS act like you bobbled FAon-off-on again really quick, but I don't think so, since the first trigger is always depressed when the second trigger is. So now when you release both hopefully "Toggle" #(Logical)1 remains active. It doesn't deactivate if you half-press trigger 1, which also sends Logical1. Only when you click all the way thru to the deep trigger does it actually flip the "Toggle" function back over and "Stop" sending Logic#1 (at least once you get off of the first trigger depression too).

I can't promise this will work but it kind of makes sense as I'm typing it. I have not attempted but you can use the VKB Button Tester after programming it to see.

To be honest, on my left hand I use the 'rapid fire' trigger "up" motion as my FA off, and set Elite to 'toggle' mode. So I just bump up with my index finger to go in and out of FA when I want, but the trigger is free for firing (that's my 2ndary weap fire).

Program the first trigger stage as ButtonD as below.