Badger, that's a good question. Unfortunately I have to go by sound files that were recorded in some instances with less than quality microphones and media. Additionally I do not have the wav files marked for the exact model of 109. I guess I will leave that up to the user. It is one of them, my guess it would be the G series since they are the most popular. One file was recorded at an airshow in Ohio, and I'm pretty sure it was a G10.
fscott