I have downloaded every signle one of your 911 rsr sound mods and i have to say i am super impressed every time. I really enjoyed the v0.3 sound a lot and i think if you mixed the v0.3 and v0.4 together you will have the interior sound spot on. There is a sorta a strong backfire/pop sound and feeling you get with the v0.4 downshifts and if you combined that with the v0.3 sounds it will be amazing in my opinion. If you do that and manage do perfect the exterior sounds then you will have an amazing mod.
Yes this is my first attempt. Still a lot to learn :)