This does not seem to be a matter of HMD fit. I did not have this issue when I was still using my Oculus CV1 and it's only started since upgrading to the Q3. People in BSVR and PiMax seem to have mixed results as well, however as BigNewy has said over and over and over and over, he does not have the problem on his Reverb G2.
So, what that means is that just because you don't have the problem, it doesn't mean others don't. Different resolutions in different displays will all need to be rendered accordingly; a one-size-fits-all does not work here. The display needs to be adjustable by the user. For me to get the HMD in the F-16 aligned so it doesn't show when I'm looking straight ahead I have to move my headset forward until the forehead pad is resting below my eyebrows. You cannot tell me that that is the proper way to wear this headset.
This has been an issue for years now and it keeps getting blown off.