The bike left case will require some epoxy, I started to make a repair but decided I would leave it for the new owner, I have the rubber plug that goes in the hole.
Once the bag was not seated properly, the exhaust made a bit of a sag in the plastic. It was filled with epoxy.
The aluminium cover has been "separated" here for as long as I have owned the bike... has not grown. The aluminium is held on with some double-sided tape I have read.