RE: P51 PTS or Arrow trainer
The "starting" configuration for the PTS should really be with the 11x6 2 bladed prop and with the airbrakes removed. Flaps working but up for normal flight. Wing droops left on.
The landing gear could stand a little re-inforcement, at worst with CA prior to installation, at best with Epoxy around the hold down block.
However with the above configuration landings are not problematic and the plane will not tip stall the wings during VERY slow approaches. The 2 blade prop gives it the missing power, while the removal of the air brakes helps with dead sticks.