I think it would be nice to add a button similar to the "include auxiliary debug content" which would allow us to remove parts in slots with core slot true and in the tuning menu allow us to bypass the maximum and minimum of the sliders. If that wouldnt be added, at least let us rewrite the tuning values in the .pc file directly, like we can remove core slot parts, because now they just get capped to the limit. With the Adjustable Race ECU, most cars have too low maximum RPM limit, as well as too high minimum RPM limit, so it would be worth making the range bigger. Also nice addition would be the ability to adjust idle RPM (lower idles could have higher idle roughness or etc) Maybe because its a whole race ECU and not just a rev limiter, there could be a slider so we can "tune" the engine to be more fuel efficient or more powerfull than the stock ECU offers, like a slider where left is efficiency and right is power, while in the center it would be the same as stock.