Bill,
If I set my front ride height at 5.5" and the rear at 6" the splitter clears the ground with the nose open. I have not been able to check this clearance on the GTD and CAV splitter yet.
The sill extensions should be ready end of March / mid April.
The rear diffuser has turned into an under car mounted adjustable wing. Only the ERA has enough room to have a wing under the car. We may have to opt for the sliding rear spoiler ala the MkII for everyone else.
I wish I had an extra few million laying around for a wind tunnel.
Pricing is still holding at $850 a splitter, $750/
pr. for sill extensions. I'm working with the guy who makes the stainless stampings for the ERA to turn out the rear wing. I've designed all the pieces and he has all the machinery needed to manufacture them. He has not hit me with a price for the wing yet.
Mark