Oh yah.
I was at Callaway when they were doing the Speedsters.
That car remained a big influence on me.
I originally conceived the GTX1 as a Speedster; no a-pillars, half windscreen - barchetta style.
Practicality yielded to roll-up windows, wipers, etc.
Here's an image of what I originally came up with.
I still want to build one that way.
We recently had three Tungsten Silver GTX1s at the shop for roof builds and other upgrades. Keven Carter of
http://car-n-art.com was at the shop the other night and offered to shoot some photos.
We've had a few requests to start building GTX1s again.
No takers yet, but we can do it.