You are speaking with the tube builder to be
There will be compression chocks inside the tubes to handle compression loads and to stop any deformation. Just like what you find on a Marstrøm Tornado.

Drilling holes is not that bad, as long as there is no movement of the beams while they are under load. Overtightening bolts on beams is a big no-no in any circumstances. Stripped nuts inside the hull or crushed alu beams is no fun either.