Les,
Thanks for the advise - as informative as ever
Missed brekky because I didn't go.
Will be there when the temperature rises above 20 again (at 6.30AM).
Bernie,
There is play in the catch, but only reverts back to its original position after driving a while. Bolts not catching well enough through the glass.
Door mounting solid, but may try to undo and reposition - just don't like undoing something that is well fixed.
I'm sure this is an issue with lots of Cobra i.e doors drop.
I've seen quite few with scuffed paintwork where the door sits on the car frame.