I added the rivet detail to the new diamond stack. I used grooved pins to add the rivets and chiseled a groove beside where the two metal sheets would join in prototype.
To drill the holes on the center ring, I used the round table on the mill and spaced them 10° appart. I used the same rivets and riveted them with home-made tools to get a nice head on both sides.
Now it’s time to add some paint and transfer the cinder mesh from the old to the new stack.