Couple of hours spent filing down flaperon control arm where it interfered with fuselage cross member below the pilot seat. Check to be sure no longer any interference and painted exposed areas with touchup paing Spent an hour or so working to get Camlock studs just right on Turtle deck. One stud in center at back took well over an hour as I had drilled it off center and stud wouldn't engage properly. I used a file to enlarge hole to be able to line up properly but then stud keeper wouldn't hold it in position. I filled hole with some Hysol and hopefully will work. Hours filing on push tube for flaperon control that had interference with one of bottom fuselage beams. I though better to remove material only from push rod and not structural fuselage member. Used touch up paint to cover exposed metal. Started to install more fuel lines. In process, saw where front spar inboard on port wing was rubbing on windshield cutout. I worked on sanding but then saw a CRACK at the corner running about two inches. I did a stop drill hole and used air grinder to really remove interference. Guess crack occurred when I pulled the aft pin on wing to lube it and wing swung forward, I remember hearing a crack but thought it metal to metal. Oh well, it cracks more, I'll just have to replace it. I'm getting good at doing that