Wellllllllllllllllllllll---------------

A few thoughts for you------------

Anti roll bars are a cover up for a suspension system that has short comings in certain areas of travel --------

Any suspension component must transfer/resist/anchor a unwanted force and to do so will be detrimental to the vehicle in its primary function-----------

A tube compared to a solid bar has certain properties because of the added surface(internal+external) I don't recall the physical law/principle, but it gets a lot of discussion at various times-------

Choices of materials and design in production vehicles comes down to bottom line $$$$$, not necessarily prime choice of methods/materials(production arb(anti roll bar) are generally mounted in soft rubber bushings mainly for forgiveablebility---so as there won't be a sudden transfer of force that could get excessive to mount points----------