The rivets are pulled from the front of the spar for all the other ribs, but because of the spar root doublers you have to insert from the rear. If you want to pull rivets from the front you will have to unbolt and remove the root doublers
With the doublers in the way, i had to shorten the rivets to get them to insert all the way before pulling the trigger
I made a small block to hold the rivet while I tap out the stem
