Beginner 3D Printer questions

[sfcfury]

So I just got into the 3D printer game and I purchased a creality 3D Ender Pro. I have done a couple upgrades already: Skr Mini E3 1.2 board, Dual gear extruder (which I calibrated), and glass bed. I have watched 87 videos on bed leveling, and I feel that's set okay. I have printed a few small items, all have which seem to have turned out very well. My first 'big' item was a drawer case to put on front of the printer. The issue seems like the second level of the print (which would be the top of the bottom drawer/bottom of the top drawer), and the top didn't seem to stick very well...
The very bottom of the case (the part touching the bed) seemed ok although it warped a bit. the sides and back seem fine. Wanted to get some input on what to attack to try to fix this. Here are some pictures.

[Prowler901]

That sagging occurs when there is no support to print on. i.e. You're print over open space. I would change the printing orientation so that you don't have any large overhangs. Or, you could add supports in your slicing software. However, it would be very difficult to remove the support structure from such a deep opening.

[sfcfury]

That sagging occurs when there is no support to print on. i.e. You're print over open space. I would change the printing orientation so that you don't have any large overhangs. Or, you could add supports in your slicing software. However, it would be very difficult to remove the support structure from such a deep opening.

Okay, still getting used to the different programs to use to do different things. Definitely will try it vertical.

[Prowler901]

Yeah, it's a whole new ballgame. But, it's amazing what can be done with them.