*It's plausible that the smaller mirrors would indicate Cd 0.251 at Darko.
*At A-2,or GM Warren,it might show Cd 0.220.
*If I restore the missing central belly pan section,according to Carr's research,this might get Cd 0.21.
This would be a 50% drag reduction,and there's still some fruit on the tree.
*With a camera system and full belly we'd be looking at Cd 0.20,which is approaching the Cd 0.195 LSR version of the 1978 M-B C-111 III record car,and inspiration for the T-100 project.(center image)
The C-111 is 'mirrorless.'