I'm currently transplanting my pc from an Antec SOLO to a P182 but the expansion cards don't seat low enough to be flush with the fixing points, I would say there's a 3mm gap. If I press further then the motherboard begins to flex. It's as if the motherboard posts are too long but they actually seem shorter than those in the SOLO and they permanently fixed to the backplate. Has anyone else had a similar problem with the P182?