Hi,

I'm trying to create a mount for 3D printing, but I'm having trouble turning it into a solid object so I can apply fillets/chamfers to some of the hard edges. There are some naked edges I can't seem to get rid of, and as far as I understand, they're what's preventing the solid from forming properly.

Any tips or suggestions on how to fix this would be much appreciated. My model is attached.

Thanks,
Frederik