Actually, no, we wouldn't. We'd assume 25% unless there was strong evidence to the contrary. Speculation on what an IT build might make wouldn't cut it.

There's no evidence this car will make 30%. When and if there is, I would support a change to 30%.

This is probably an area of how classification works that has changed since you left the ITAC. We have a STRONG preference for classing at 25% initially until proven wrong with actual evidence.