Building 2nd. prototype and need complete Helicopter Hub with mounts for servos & Swash plate.1st had fixed pitch ! 2 Blade version for 6' by 11" Rotary Wingspan! Old School Covered Balsa with spars & ribs.Screw on Bottom will Sandwich Blade! Battery in each wing near center.Limits Rotary contacts at Hub! 3 From receiver to e.s.c.s before split! Might use Auto steering wheel contacts Adapting them for My Shaft?1st was Drum with bands Brush motors