The car feels very unrealistic on the basis that the level of grip is far too high and the power is too low and gradual. I compared this model to a video of a real car on Willow Springs with a laser-scanned version of the circuit on AC and the driving style, straight line and cornering speeds are completely different. The real car is a lot faster down the straights but is up to a second slower through some corners as they need to lift and the mod can go full throttle.
Also on Lime Rock, I only need to get off the throttle at all for two corners, otherwise, the grip levels let me drive the rest of the lap flat out which is also unheard of. Especially with the experience you have in the series in real life this mod has a lot of potential and could be really interesting, but as it stands it needs more work.
glad you like it