A simple ejection seat for your builds. Just say that the ejection seat in your build is by me. If you use it, check the connections of all the parts, like the seat itself should only be connected with a detacher, the cam, the cockpit thing (not the visual cockpit you can put buttons on) and the parachute. Or the detachers should only be connected with the cockpit (thsi tine the one you can put joystick etc on) and the canopy or seat. You can change the AG if you want but then do it on all parts (you need overload mod for the parachute)
You can also put a button somewhere with the AG of the seat.
Hope this helps your build being better

Here is the ejection seat in one of my builds: eurofighter