Worked on trimming leading edge and main skins to get the edge spacing just right. I'm happy with all the edges except where the outboard leading edge overlaps the center leading edge. It will have to do as I don't want to violate margins. Its about compromises and I've learned its hard to put metal back on once you've removed it. Completed drilling center skin. Step #24 is done! I'm loving my new Makita LXT Sub-compact drill. The air drill work well but the noise is pretty loud with the compressor running all the time and when I'm really making progress with the air drill the compressor can't keep. The Makita is light and the charge is lasting a long time.