Obviously you were using an abrasive felching device . Historically less effort was required using a smooth equivalent .The traditional Johnson mounge strap in leather ,has now been superceded by a modern {vegan friendly }equivalent.
Putting my health and safety head on , Pat I hope you were wearing a carbon fibre cod piece and leather face mask,as the Johnson mounge strap is notorious for it's ability to flex .You don't want to end up like Major Digby Prewett {1875-1921} Scots Guards {retd} , motally wounded at his Weybridge family seat whilst demonstrating the application of said apparatus to his young chamber maid , Mary .
You have been warned

Rob