My best is 405 x 20. 520 x1.
Unfortunately you're on Getbig so that means Getbig logic applies to your claim.
That said, "My best is 405 x 20. 520 x1" auto-translates into "225 x 5 and 275 x 1".
My apologies, but GB logic is what it is.
Now in order to refute the GB logic you'll need various video clips from multiple angles showing you performing the lift. You'll need to be almost naked so clothing and equipment doesn't aid you in the lift. You may not use any spotters. The dbs must be weighed prior to lifting on camera. You'll need to provide a currently dated newspaper, birth certificate, driver's licence, social security card and a photographic portfolio of your professional, competitive bodybuilding career in order for your claim to be validated. Also you're current weight must be 250+ and your bodyfat percentage below 10%.
You have a week....all the best!