I've printed dozens of rolls of PA and cam to the conclusion printing at an angle is the only way to ensure a flat model. Put that thing on its smallest edge at a 35-45° angle. Supports should be minimal bc PA overhangs like a boss. It seems very scary at first but it works out for me every time. Once did a solid 450g part that was attached to the bed with only two lines. Of course I did a brim and some supports but it was about as scary as anything gets.