How about we all let Yo-Yo do his own research? I think he might have done it before and might even have made flight models for DCS before!
I'm sure the spit will need multiple revisions after release but I'm also absolutely certain It's going to be the best simulation of any spitfire so far.
I think the problem here is some feel everyone expects the spit to be an Instawin Uberplane and have to show it wasn't. Others feel the former few forum nembers want it to flip on its back and explode the second you look at it. I'm gonna go out on a limb here but I think both groups are wrong ;)