You won’t be able to do that without declares. Xojo will report 1024 x 768 points for all iPads, mini or not, Retina or not. You will not be able to address the special Retina features without declares either.
BTW the new iPad Pro will be 1366 x 1024 points (2,732 x 2,048 pixels), marking a departure from the usual.
You are right, Dave. I don’t care. I just had to fumble around until I figured that out. Since all the documentation about “@2x” talked about still images, I just assumed I had to manage my quick times on my own. Doing so assured that nothing worked. When I stopped, life became good again. Sorry for the false alarm.