Climatronic recirculation flap and servos overhaul

Ever since I changed the climatronic I had three permanent errors that didn't go away:

9472881 — Motor for Fresh Air / Recirculated Air Flap
B108B 71 [009] — Actuator stuck
9472882 — Motor for Fresh Air / Recirculated Air Flap
B108B 54 [009] — Missing Calibration / Basic Setting
13701424 — Function Restricted due to Missing Message(s)
U1111 00 [009] — —
These were due to the fact that after 2008 the fresh air/recirculation flap used one servo motor to activate the flap, where before it used two servos to do the same thing. I guess it was an upgrade, considering the ease these servos broke, using only one reduces the possibility of failure by half.
So the clima panel is expecting one servo to do all the work, and despite having the old servos connected in parallel, they never worked properly, so I had the errors above for years.

Last month I decided to remove the dashboard to place the DCC harness along, and since I had the opportunity, I decided to replace the fresh air/recirc flap for the new model, and replace all the clima servos that were driving me crazy with the clicking. I must say, this might be the hardest thing I did to the car, not because it's difficult, but because there's so much to be done in poorly accessible places.

The new mechanism uses one single servo, the mechanical wheels and levers do all the work. Because of this the position of the rotor is similar to the old ones I had, but not the same. I decided to buy a few servos from a B7, but then an opportunity appeared to get some from a golf 7.

Edit:
These are the references of servos I'm currently using:
2Q0907511E / 1K0907511Q / 31.93897(3C1 819 241 J) — V213 Front Top flap servomotor 120º POTI
2Q0907511E / 1K0907511Q — V107 Driver’s side Second Top flap servomotor 120º POTI
2Q0907511E / 1K0907511Q — V158 Driver’s side Third middle flap servomotor 120º POTI F.T.3
2Q0907511F / 5Q0907511L — V426 Driver’s side bottom flap servomotor 340º POTI F.T.3
2Q0907511F / 5Q0907511L — V425 Recirculation flap servomotor 340º POTI
2Q0907511E / 1K0907511Q — V159 Passenger’s side bottom flap servomotor 120º POTI

The old flap box is not easily accessible, even after removing the dashboard.
Removing the flap is a job to be done patiently, methodically, with calm. I had none of that, so in the end I broke it off by pieces.

In fact, I had to remove most of the frame that secures the dashboard, including one bolt that secures the frame from the engine bay, by the wiper motor (having to remove the wiper arms in the process).

But this makes life easy fitting the new box in place, and accessing the bottom servos, so I still recommend doing it if you have to do any of this. But from the reports around the web of people doing it, this was still the quickest option, only 4 hours.

Fitting the box was easy after that, with some convincing to be done. After that, just fix the servo motor, choose the correct connector, and do the flap adaptation. After having the correct motor, all errors were gone.

This took about a day, and then I decided to replace all the bottom servos, V107, V158, V159, V426, and that took almost two days.

I must say that after replacing the servos, the clicking stopped, but besides that, these new servo motors are quieter than the original ones. All that made all the effort even more rewarding.