Thanks, Bolt Masters in Brisbane sell solid rivets I bought some off them when I did my door tops about 5 years ago , I will give them a try 1st. I also have some here but the shaft is about 1/2" long & they have gone hard but I think if I cut them down to length the rivet I made will squash them.
I am also going to try pop rivets that are longer so they don't have as much grip .

