How are you installing a GPU in RealCube then? It seems like you'd have to connect it to the mainboard first and then insert mainboard and GPU into the case together.
You've overlooked my feedback about the ODD position
Right, that's how I install MB and GPU at the moment, mabye I'll change it how it's done in this case, cutout from slit to panel edge with a counterpart attached to the side panel would work (that's what you meant @Phuncz, right?)
And right again but the location I won't change because I want enough clearance between MB and PSU for the waterblock, hoses and cables. And I like that the case sidepanels are perfectly square at the moment.