I’ve always felt like the gearbox in the LEGO Technic Heavy Duty Exacator was a missed opportunity! No problem! I modified mine to include a distribution! Now, one knob will control both the linear actuators independtly.

Download the complete instructions for the modification:

 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
	 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
	 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
	 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
	 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
	 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		 
		