It's a shame about the exposed roll bar.It will have premature laminar boundary layer separation.
Would the rule book allow some sort of dimples,trip wire, or micro-vortex generators on the tubing?
I know it's kind of splitting hairs,but the interference drag from the tubing loop will be disproportionately large,especially since it's in the aft-body area,compromising the head fairing.
During World War-II,the directional hoop antennas on Allied,Luftwaffe,and even Japanese Imperial aircraft were often enclosed within streamlined housings to cut drag and extend flight range.
