Notched all cradles tonight to accept the angle iron stringers. Amazingly, they all fit almost perfectly. Tomorrow I'll fine tune a couple of notches so that the stringers are not above the cradles. I'm going to have to cut the trailing edge stringer at BL 138, and then work on the flap and aileron stringers, which will require a bit of cutting and welding to get them the exact length. I'm glad I went to 3/16 inch thick angle iron, as it is quite stout and stable.