Tim,
Thought I would let the others have a crack before I chimed in.
I wasn't aware it was a strongman comp so that settled a few questions for me.
Given that it was you must ask yourself how much are you willing to do to succeed in strongman.
Your basic technique is sound but you have no powder on your legs and have boots on, let alone the fact that you are lifting raw. My question therefore is how well prepared were you going into the comp and are you willing to do more next time.
Using straps for singles is foreign to most of us in the IPF but is the norm for strongman. Most strongman however do have deadlift and squat suits, use chalk if needed, powder, sometimes wear slippers or socks etc.
What I'm talking about is maximising your chance at lifting your max weight.
With a tighter set up, better head position, powder on your legs, a decent suit and slippers you might have pulled 280kg!
Training in a suit and using slightly better form with the above extras would get you up towards the 300kg mark.
Again my question to you is are you willing to go the extra mile to succeed. You obviously have the potential.

If you don't stand for something you will fall for anything.