I had a go at fitting one of the door panels, connecting the door opening mechanism with the latch.
It opens the door quite easily (although it's a bit of a squeeze).
I then fitted the driver's seat and had a fit in it. Unfortunately, the roof bars are close to my head.
I spoke to both John and Keith about it, and they said that they aren't very structural (from MIRA's reports), so can be removed. I'm slightly worried about what happens in a roll, but there'll be more protection than a typical 7.
They'll have to go...