I AGREE with birdstrike.
while the overall sound is good, the difference between different rpm settings is not noticebale anymore. please dont forget, that contrary to the other ww2 birds, the 109 has the option to use manual prop pitch. to use this feature successfully, its very important to be able to hear the different rpm settings. for example AT LEAST there should be a noticeable difference between 2600rpm and the upper limit of what the engine can handle, 2800-2900rpm...please this is important for MANUAL PROP PITCH PILOTS.
thank you