Weird. The real P-40 had an auto-mixture system but you still would set it to “auto-rich” or “auto-lean” in flight I believe, and there are aircraft for MSFS that have this implemented like the BR Goose if memory serves.
Airshow Model only 2 Paints, War Model 8
10 paints doesn’t seem like a paltry amount to me.
Anyway, I found a couple video impressions:
I think they’re definitely overcharging for this when the IniBuilds P-40F and the BR P-40B are already out for less.