So, what was wrong with the way we were taught, and practiced on theRAF when I was a QFI, 1960s.
Speed low or decreasing, add power.
Speed high or increasing , reduce power,
Roll till turn needle comes off stops. ( it was done on limited panel , assumed ah had toppled)
Pull or push til vsi comes off stops, or altimeter reverses.
CHECK, you are NEAR straight and level .
Adjust and trim for level flight.
It worked !