Finished the stiffners tonight. The two inner stiffiners are made just slightly different. Next up is the brackets that mount the fuel tank to the spar. The instructions indicated that this was complicated and extreme care should be exercised to make sure it's correct. Spent about an hour reading the drawings and holding parts here and there untill I understood how it all works. Buffed the edges and rounded the corners of 14 pieces. 7 for this wing and 7 for the other.