Capt Sensible.
I've no axe to grind. As a L/M, my butt is on the line just like yours (assuming yr a capt).
My previous is FACT.
Don't bother blaming a handling agent. Why? Because an agent is representing our respective companies. The company (& by default the likes of us) carry the can. In other terms, ABC handling agent can screw up for DEF airlines. ABC will have to answer for it (unless gross negligence involved). It is OUR responsibilty! As they love to tell me, "you can delegate tasks, but never responsibility".
------------------
rgds Rat