Finished preparing the attach points on the cabin to the frame. Needed to countersink all the holes on the door sides and sill to accommodate flush screws. Removed the cabin top and deburred all the holes in the fuselage where the cabin attaches. Dimpled the holes in the upper skin and cabin upper fuselage top skin that both mate to the cabin top. Counter sunk the holes in the flanges of the cabin top to accept the skin dimples. Prepared the rivet strips which will go inside the cabin where the flanges are riveted to the side skins and upper fuselage skin.
