Spool holder - spider web pattern

This was my first design and print so I just ran the generic settings suggest in Cura.
The sides worked out perfectly but the cylinder cross member had some stringing affect on the bottom. I need to learn more and tweak the slicing settings. If you have any suggestions I would welcome any advice.

I designed the feet hole diameter to fit a 1/4 inch thread perfectly. I cut threads 114mm long and sawed a notch in the ends to use a flat head screw driver than just screwed them in. The sides are solid as a rock even when the cross member isn't supporting the top.