My pump is currently around 3/4 out from flush. Reason being it was far too rich on idle. I think my particular CDi could probably be leaned further on idle as it still sometimes "richens up" when left idling for a bit then advancing the power, especially after a vertical dive and then going back up 45 degrees or vertical again e.g. in the horizontal hourglass in the F-09. My main jet was around 7/8 of a turn out but is now about 1 1/4 - 1 1/3 after leaning the idle.

One thing I have noticed is that the sound of the CDi is not as sweet as the 170. It is a slightly harsher tone which I'm not so keen on.

Has anyone tried running a low smoke version of the 170 on CDi fuel? When I get a bit more time I was going to remove the spark plug and put in a glow plug, then put the pump back to flush and main needle in the norm 170 position and then run it on my 10% oil CDi fuel just to see how it runs.