Taipan boom is just a tube, nothing special. It allows outhaul and inflicts pressure for the mast to rotate.

I have a worry I have not measured for yet. Usually, boomless boats have the rear beam behind the clew plate so the main sheet set pulls back on the foot of the sail to provide outhaul. Boats WITH a boom have the beam in front of the clew plate causing forward pressure on the boom to rotate the mast. The Nacra 5.0 Seems to have a very small tramp. I don't know yet what the angle of the main block set is, canted forward or backward. Actually, I've never raised the main yet! Still a work in progress...