[Monster Hesh]

Yeah, there is a lot of scope on the aero side of things, still think the biggest issue will be weight for most teams though. I expect Merc, Ferrari, RBR and McLaren to have achieved the safety standards with minimal weight gain, teams won't be closing that up much during the season.

Am I correct in thinking any saving of weight can only come from the `mounting` side as the actual Halo is provided to teams by a third party?

Correct, you could add the amount of fairing they plaster onto the 'Halo' also.

As Jody says, the big budget teams will win this battle. I imagine that their support structures could be 3D printed. Open the avenue of hollow webbed structures, perhaps using cellular topology, so its light and strong.