We re-arranged our crossbracing to allow for a similar hole while still providing rigidity. We also planned an opening in our (extremely thick) torsion box table top to allow for vertical clamping. We have a removable bit of wasteboard to cover the hole, but it’s removed in this pic (you can see it laying on the table in the background).
Please excuse our lack of tools and relative tidiness in this pic. We had only been in our new house for a few months when this was taken, so we didn’t have time to fill our workshop with junk and make it all “lived in” yet.