Aren't there four arms in the cockpit? (Maybe not in 411s case.)
411A has the pleasure of having six arms available.
Go-around.
Flying pilot calls for go-around thrust, advances the throttles to approximately the desired thrust setting, and the Flight Engineer trims the thrust, as required.
A tried and true technique...providing you have that professional Flight Engineer available.
Don't leave home without one.
Yes, I know, the two man crew is the norm these days, however, that third set of arms/eyes can be very valuable when it all goes pear-shaped.