jnich67
I keep my thumb centred on the neck face but the thumb sort of slightly sits on the faces upper corner on each stroke nearest the blade.(V hard to explain)
My index finger sits on the underside flipping/rolling from the finger tip to the first joint crease with each stroke. My other fingers but mainly my little finger, curl slightly around the scales to control the balance.
I believe as long as your thumb is pressing centred (biased to the blade side ) on the neck, you automatically apply the right spread of pressure to the blade.
Sounds like you are right by your description. I tried your method and it does work.
PuFF