Riveting the skins of my RV10 tailcone to the stiffeners. I found it easy to back rivet as I can do this alone using a flat plate from Avery. The other option could have been to drive from the skin side bucking on the inside against the stiffeners. When I have driven from the outside on the elevator and horizontal stabilizer, sometimes I dent the skin, which I don't do by back riveting. If I run the pad of my fingers over the backriveted work, I only note a slight depression of the dimpled site. However if I pick with my finger nails, I can usually feel an edge of the rivet on one or two sides of the rivet. I have been told if I had used a Cleaveland tool dimpler instead of an Avery dimpler, I would have nicer dimples. Does it matter that I am back riveting at this location? Does it matter that with my finger nail I can usually feel an edge on at least one side of the rivet even though I feel nothing with my finger pad?