How in the world is a trap door going to solve what they believe to be an oil pan capacity issue?
Besides, if it is the SHO Shop talking in that article, it has been covered in the last few days and a few times in the past as well. I doubt that SHO Shop did their own testing to determine how much oil is in the pan (just regurgitating what they read here, which I personally don't believe anyway - crank harmonics killed my last engine, not oiling).
And their pan kit requires mods to the existing pieces for the dipstick to work properly. I know; I have one.