Strop height...Doorknob. I zip tied a key ring around the narrow inside part of my bathroom doorknob and just clip the strop to it.
Cushion...kinda refers to the thickness of the lather. Put a good dab of lather between your index finger and thumb and lightly squeeze. With good cushion you will almost feel the lather push back. Sorta springy. No cushion the lather offers no resistance and just collapses.
As far as the nose...if you do a "fools pass" and shave your upper lip against the grain...well the risk is yours!
Pete <:-}