I embarked on a bit of a tidy up as I will have to remove the left wing from its trolley and lie it flat on some stands. This will take up all of the space in the garage until the repair has been effected. Meanwhile, I continued removing rivets with the wing on the trolley.
At this point my compressor gave up the ghost. After initial investigation, I came to the conclusion that the regulator has had its thread stripped. I'll need to figure out how to get this fixed PDQ.