Today I clecoed the skins & longerons to the rear rib assembly so that I could mark then drill the 6mm holes for the tailwheel mount M4 rivnuts. I believe I needed to do this at this stage as waiting untill after the rear fuselage is assembled would leave too many holes with rough, unfinished edges. I just hope the holes are in the correct positions. I'll debur all the holes then redo the etch priming of surfaces that require it over the next few days amongst some study as I have another simulator session coming up this week.