I use the metal bar made from a brush hog mower blade. I place the rivet in the hole as if to back rivet, then tape it in place and then lay the part on the back rivet plate. You then place the bar on top of the rivet and hit the bar with the riveting gun this indirectly drives the rivet. What I was able to do with the elevator is get the rivet started with this method and once the rivet was flattened a bit I had the room to get the no-hole yoke in place and finish the rivet with the squeezer. As you can see the rivet set up nice.
Bar, I also use this to dimple the ribs
Run gun againt bar while holding the part agianst the back rivet plate
