Rigid square for optical table

This is a rigid square designed to be used in optical tables. It is like 2 general-purpose table clamps from Thorlabs (https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=191) put together making a 90-degree angle, and a little thicker to make it stronger. It has a 50% infill to be very rigid, and using a 0.8 nozzle with 0.48 mm layer height it takes around 30 mins with no supports.