The blind doesn't stall correctly and has a clicking noise when at the fully open position. Why is this?

• Check drive shaft has been fully inserted into the V-Shaft adaptor and is being held in position with the GrubScrew.
  
  
• Check V-Shaft adaptor is aligned and pushed fully into the motor. There should be an audible click when fully inserted.
  
  
• Check the plastic teeth on the V-Shaft adaptor are not worn, missing or broken.