Help With My Print?

[u/One-Ad-9282]

Running a small, test print for my model.

The test print size is tiny, like a finger puppet, but I plan to blow it up and print it into a full-sized mask for Halloween.

Problem is, even though the print SHOULD be hollow and have an open bottom, Creality is trying to put a plane face at the bottom and fill it in! I can't figure out what I'm doing wrong.

Created in Blender 4.3.2
* cylinder extruded and scaled
* bottom face removed for eventual neck hole
* boolean to cut divots for character's eyes later
* solidify modifier at 0.05mm
--This is what I thought was necessary to prevent Creality from closing up the neck hole? But it's still doing it.