I just started on the tail section of the -12 and am quite surprised to see that the holes in the skins and most of the ribs and spars are already punched to size. Is it safe to say that these factory holes do not need to be de-burred? I have previous experience with the tails of the -10 and -9 and both of these kits required that the sub-structure be clecoed together, the skins clecoed in place, and every hole be drilled to final size. Then the entire thing is disassembled and all holes de-burred before final riveting. I cant find anything in the manual that indicates anything other than de-burring the edges of the skins then riveting them in place. I just wanted to throw the question out before I made a permanent mistake.... Thanks in advance.....