The model is still not precise at all and needs tons of work or even rework. Looking at the first picture you post, the side pod. You need more pictures and see how the car really looks. For example the engine cover's edge is actually completely straight, it is the small fin that make it look curved. And what's more, there's only the end part of the diffuser. For others I want to say just look at these pics
https://i.imgur.com/p3rbH8P.png
https://i.imgur.com/yBNQ44g.png
we see the outside when looking into the air intake and
https://i.imgur.com/RPNLG94.png
https://i.imgur.com/Wtb9jvu.png
As for the physics... You told another guy the physics is fine, but it's true the physics is VERY weird. In old versions the downforce of the front is so small that the car even takes off at Eau Rouge according to a video in YouTube. I don't know if it is really corrected but in 0.9 I'm sure the downforce still has some problems (maybe the downforce of the diffusor is too low as we know most downforce come from the diffusor, looking into the files, the diffusor's coefficient of lift of your R24 is much to smaller than the F2004's diffusor...which makes sense) as a result the rear axle's grip is very low and that gives the car much oversteer, which make it very very unstable. In addition, the engine is almost 15% stronger than the F2004... If F2004 has really 865 bhp as Kunos described in ui.json, your R24 has in fact over 1000 bhp rather than "900 bhp" as you described. (I may remind you the Power.lut is not engine torque, it is torque on wheels if the transmission ratio is 1:1 so power loss on drivetrain must be considered)
As a result I'm sorry I cannot give any better than 1 STAR. We know this is your first mod. But I give stars only according to the mod's quality.