And about my elevator question?

Hood

You need to be switching to fine pitch as your speed drops.

It's like cornering in car, you down shift gears to get the engine at high RPM and maintain responsiveness, acceleration and "pull", then when you exit the turn you accelerate and switch to higher gears (coarser pitch) once again.

It's harder with the currently bugged prop pitch because pitch control is too slow, but i could do it fine a couple of patches ago.

But as I understand it, a fine pitch causes more drag at high speed than a coarse one, therefore vmax may not be at max rpm?

It's not then on fine pitch, look at pitch clock. Fine pitch at high speed will cause over revs. Like a car plane will made best speed when engine is giving every HP it can get, and it is on max allowed rpm and max allowed manifold pressure.

Only partially correct, because pitch doesn't equal RPM. The same pitch can give different RPM at different throttle settings and airspeeds.

You can easily test this in the Tiger Moth which has a fixed pitch propeller: if you accelerate or open the throttle the RPM goes up, if you decelerate or close the throttle the RPM goes down and all that happens with the pitch remaining rock steady.

Therefore, Vmax at max allowable manifold pressure and max allowable RPM doesn't mean full fine pitch.

It means the pitch that gives the max allowable RPM at the given airspeed range, which will be sufficiently coarse at that speed. ;)

Anyone realized that when one drops the flaps on the 109 the ailerons also slightly deflect down and now takes this as the new neutral position? Is this how it was?

Yes

Those are called 'droop ailerons' and they increase the camber of the wing, which supplements the effect of flaps and increases the maximum section lift coefficient

actually i found e fatsest at 2100 rev