Disassembled the fin and dimpled the holes on all structures. I also found the three starboard holes that were drilled too large and dimpled them using a larger die, this will allow the use of a slightly larger AN426 rivet which will fix the problem that arose when i drilled the three holes too large by mistake.
Thank God for my workmate it makes it much easier to do this work by yourself. Image 1 shows the dimpling taken place in close up. Image 2 shows the workmate in place and my rivet squeezers how i used them. Image 3 shows the stack of ribs , flanges and PP801's
Now for the priming of parts and rivet them together!