Airfix adhesive would probably be okay but I wouldn't glue anything in there although I would ensure my rivetting was good. You may need a practise run to get it done correctly.
Those rivet guns are okay, I have one, but you may need to ensure you have the correct rivet size: The rivets on the ADV top box latches are a BMW sizing experiment but a local engineering suppliers found something close to what was required.
You may need to look at some fiches to find the correct sizing.