Printing the corners - are they supposed to be like this?

I'm really happy to find there's still activity on this forum and have started a build based on laser cut case parts and metalwork from Drakken.

I've printed out the corner parts for this, but they seem oddly flimsy. I have test fitted one of the base corners on a couple of acrylic sides, so the dimensions seem fine, but the side walls are formed of two thin walls each, with a gap, as if there should be some infill. This is not apparent on the renderings of the stl files on Github.

The photo shows this quite well:

Has anyone else found this? I have not had cause for concern with other prints.

Thanks, Chris.

You should not have voids in the middle. It think your print settings may be wrong.

I specially made a video for you 4 years ago haha

https://www.youtube.com/watch?v=yfkB6idPDPU