I guess it's an uncontrolled airfield in Germany. So there are no clearences.

Yes I think so

the owner wants to protect the mfd from any overload whilst engine startup

No. The seat is fixed, but the rudder pedals are adjustable.

It's not a tower-controlled airfield. It's the pilot's responsibility here, not that of the "radio" operator.

the plane is at a very high AoA immediately after rotation so this happens from time to time

@@robmancuso7600 AND the speed is not in the green range, while the flaps are already up! It's still in the white range (meaning: flaps should still be used) for quite a while...

The owner of the aircraft wants to pull the MFD circuit breaker to prevent the MFD being damaged by possible Voltage peaks during startup. Transponder 7000 is standard for VFR flights in Germany.

And the ALT? Is that a German SOP I Know some airports want XPNDER to be on ALT but most will want you to be on GND or STBY

It is not a standard operations procedure in Germany. According to the G1000 manual an automatic transponder mode is available that sets your transponder to GND on ground and ALT when you become airborne. But maybe it is for better visibility at bigger airports. See this article: www.flyingmag.com/technique/tip-week/use-correct-transponder-mode

The owner of the aircraft wants to pull the MFD circuit breaker to prevent the MFD being damaged by possible Voltage peaks during startup.

The power of ownership :) Extend the AFM with custom-made instructions at any time.

that's silly.

All of the check list is weird saw a lot of missing steps

@@cessnawings That's idiotic..... A CB isn't a switch.