R4 Rear wings

[robg]

My GTL has both bolt and rivet fixings for the rear wings. I would like to remove the wings but will have to drill out the rivets.
Can anyone advise on the size of these rivets? I had thought that I would replace the rivets with flat head bolts assuming that
the rivets would be irreplaceable having drilled them out. Is there a better solution?
Thanks
Rob

 

[angel]

I think they are 5mm, but it matters little, they are replaced with appropriate sheet metal screws with hex head on reassembly.

 

[robg]

many thanks for this
Rob