Kiril Varbanov wrote:...
The floor needs one more curve in the outer side edge between tires - I couldn't see it in the video - may be there. The same goes for the three vertical strakes ahead of the diffuser's trailing edge...
There is a thread here in which I discussed the nice fillets that red bull puts between the vertical diffuser strakes and the lower inner surface of the diffuser, but I can't find it. in any case, they showed their thoroughness in adhering to fundamental aero principles by adding those fillets. they reduce the junction drag and reduce separation at the strake/diffuser surface junction.
I posted a picture of the spitfire wing roots used to do the same, but I can't find that either. sorry for being so inept at finding stuff on the forum.