Hi James!
I'm driving the car again indeed, in fact I've just returned from Le Mans! It didn't miss a beat there, but sadly this morning it refused to start again (after 3 times it eventually started), so I'm afraid the fix wasn't permanent.
The mechanic changed the sensors for the hood, as the previous mechanic had tampered with them. Aside from that he made sure all relavant connections were properly connected, as he didn't seem to find any real fault. It seemed to have cured it for a while, will let you know if and when it comes back, I might ship the car over to the UK in that case.
All the best,
Frank