I certainly am no expert at flying the 109 though... So I am learning as well! - Main thing that I'll have to learn to fly it better is to CONSTANTLY fiddle with the prop pitch to remain in the sweet spot of the Daimler-Benz, 2350 RPM.
Some interesting comments I got from MasterBlaster on the banana forum:
http://forum.1cpublishing.eu/showthread.php?t=30838"
*When you are climbing out to 1000m and notice you are
"a little slow". Instinct should be to push the nose
down slightly to get your speed up. Adjust elev trim
accordingly.
*When your cruising, mp is little too high. You should
be able to cruise at 1.2 ATA and 400 kph. You were
running 1.3 or so most of the time, which isn't so bad
with the rads open. But you should be able to run rads
closed and 1.2.
*When you are zoom climbing in your loop, you went to
fine pitch little too soon. Hear the rpms spike? That
was a speed penalty you did to yourself. Instead, go to
fine pitch based on your airspeed, not simply because
your are climbing. Use 250 kph as rough guide for
transition from fine to course and course to fine.
*The rads, get in the habit of opening and closing. In
general, open when your going slow, close when your
going fast. Where "slow" is speed less than 250 kph.
*When you climb out, it doesn't have to be at the ideal
climb rate all the time. In combat, it might not be
ideal either. Trade static climb out for zoom/step
climbing.
*Get in the habit of constantly working the throttle, pp, trim, rads,
AoA, all relative to your energy(airspeed/elevation). At any moment, there
is an ideal configuration that you are optimizing to for more speed,
acceleration...etc. It isn't just "set it and forget it"."