I was moving the plane around today after getting the main wheels installed, and dropped the tailwheel from a couple of inches as I was setting it back down. Vertical Stab was removed and the only thing holding the aft steel fitting to the last bulkhead WAS two an3 "keeper" rivets. (I forgot that)
So the rivets sheared off and the stinger made a small ding on the aft bulkhead and I have to put a buck in the swear jar.
So be sure to keep those 3 AN4 bolts in place if you have the tail off - which most folks do when transporting to the airport for assembly.