That POS known as the Jetstream was the most unpleasant aeroplane I've ever flown. Poor control harmonisation, terrible engines (in the RAF's T Mk 1) and every method of generating electricity bar the Van de Graff generator or the Whimshurst machine.
If Pusser wants to continue flying those ba$tard things, the very best of luck.
Because the T Mk 1 had such large props for its size, the slightest change in power caused pitch, roll and yaw transients. Which the autopilot could probably cope with, if it wasn't so useless.
My rule on the thing was never to close the noise levers fully until the wretched thing was on the ground. That at least meant you didn't fall out of the sky in an uncontrolled rolling motion when one of those joke French engines idled before the other.
Sodding horrible thing, the Jetstream T Mk 1. I hated all 15 hours I had to fly on it.