Airframe information

I am setting up a DIY x quad with the pixracer and I am unsure which airframe to select in QGC. Is there somewhere that I can find information about each option?

Have you seen this?

I think for quick flight, you can determine the airframe based on your copter size. Under 250mm, you should use 3DR DIY QUAD. That’s from my experience. Hope it helps

My drone is a 250 so I guess “generic 250” should be fine. Does this option just adjust the PID settings or does it change other things as well?

I think it is only PID