After deburring all the holes I dimpled. I did most of the holes with the DRD2 ( as we call it). I used it on both flanges and skins. There are a few holes I had to do by hand with the vice grip dimpler.
Not dimpling the top and forward edge holes of the side skins worries me about the future. I guess I'll be dimpling them later with the squeezer after they are match drilled with overlapping skins.
Another thing I did was to position and drill the rivet holes for the tie down bar to the 712 bulkhead. Later I'll drill the bolt holes that hold the verticle fin brackets.