Mounted wires, display and switches for flap control. Conect to the battery in my car and test, works great. Adjusted potentiometer and now display shows right position. I will exchange the wires to meet aircraft standard. When mounting the upper skin 6-C-1-4 against firewall it fit really bad. Found a 10 mm gap between F/W and skin. Spent some time with bending and adjusting firewall upper side. But I need more fine tuning before start riveting.