parts needed other than the 15 3D printed items are: Eagle Tree Eagle Eyes ground station Eagle Tree power panel. 30 mm inside dia Ball race 30 mm inside dia thrust bearing with washers 2 5K 10-turn potentiometers 2 Standard servos Asstd M3 machine screws 5mm 10mm 15mm M5 machine screw 15mm M5 machine screw 20mm