Machsparrow,
Sorry my friend, but I have to say something. You're full of it!
Your story about
they were unable to effectively control the rudder pedals during spin training and spin recovery
and blablabla is quite funny to read.
I know several short pilots who fly commercial jets without any problems. Cathay may have self-imposed a minimum height, but that's just them.
To the original poster: I suggest you contact Cathay. I would be surprised if they fail you only because of you height. They do employ current "short" crew. In any case it won't stop you from pursuing an aviation career.