[captain harlock]

The Kontronik did not perform as good as the Plett probably becuase it has a smaller rotor than the Plett.
Something better would either be a Lehner 19 series or the Neu motors.
Be aware, though, the Lehners and Neu might not come with 1/8ً shaft like the Plett extreme. The lehners are 4mm and there are 3mm per request.
The Nue motors are cheaper and slightly more effecient than the Lehner 19 series.