John, DF does do vacuum bagging. I was there watching them working on the first couple stages of NSX-R seat replication. They don't like to do it on normal stuff because it is time consuming, but on things that matters, they do.
It is not difficult, and that could well be the case. As I mentioned I am simply reiterating what I was told at the time.
Over all, it make sense to hear some one mention Dry Carbon doors for NSX racing cars. I wonder this company do stuff for JGTC.
AFAIK the teams are required to use a handful of series approved bodywork. I do not know whom GT-One is outsourcing their fab to but I doubt it is Dome or a comparable factory effort. I heard some of the tuners were apparently using the same place but I don't recall the name of the top of my head.
What the word on the weight / yen / availability for a fiberglass version?