|Sensible divers don't take on tasks that involve tiny setscrews on top of setscrews. Nor do they undertake to juggle a hub, a shaft key, a shaft nut and blades. Or Loctite, which doesn't work under water.
Sorry you've missed your installation window, but do it once, do it right – if you've not done it before, folding props are a mental and physical juggling act that need to be done on the hard. Otherwise you end up like a member of my club, who found his new prop had spun off somewhere between Trenton and Belleville.
Not a great role model, Cdr Crabb. More like an admonition.
C&C 27 Mk IV