Return spring

Accelerating pedal return spring had been once broken and was remade by handcrafting of the professional engineer few month ago. Being in a trouble of displacement of accelerating pedal hinge pin outside laterally, checked I carefully the function and the cause of inconvenience.
The coiled portion of a return spring should be adequate enough to set in the groove when it is set in position by making it's diameter smaller with winding force preventing lateral displacement, so did I make the diameter after some cut and try attempts, perceiving the importance of the hinge rod positioning in correct place because strange movement of accelerating pedal influenced by loosing good hinge support does affect driving feel so much. This may be a trifle minor trouble but it's better without.