As long as you can maintain up to 150 Lb pressure on the rudder
Mac, the aircraft is perfectly controllable, and doesn't "
crab horribly". That's the certification requirement, or at least it used to be in the era that
411A speaks of. It may have reduced in more recent times, but frankly I don't know if this is so.
150 Lb would exceed the total body mass of some smaller build pilots, I remember smiling whilst watching a small pilot doing assymetric training on a DC4, he had to lift his bum right out of the seat to apply his whole body weight to the rudder.
Regards,
Old Smokey