Yes, I have been known to say "Never fly the "A" model of anything!"
Yes, I have flown a lot of "A" models....with the resulting laundry problems they can produce.
At least I am much luckier than some of my business associates who were around for the more catastrophic events that happened.
They learned about tail booms falling off, tail rotor gear boxes complete with tail rotors and vertical fins disappearing into the forest, main blades rotating in the cuff, main rotor blades departing for parts unknown, control rod ends pulling loose from the rods, swash plates failing, synch shafts failing, short shafts being installed in reverse, plastic liners separating inside engines, power turbines exploding and severing high pressure fuel lines, mast bumping, mast failures, and a few other minor occurrences.
That is why I am suspect of "A" models!
That and I care not to be an unpaid Test Pilot.