The nails fashioned into pliers is an inventive and impressive solution. What we're looking at is essentially a "Snap Ring Pliers". All that's needed is a pair of pliers whose tips separate when the handle is squeezed.
Or, you could grind the tips of a needle nose pliers into a flat and suitable shape. Then just separate the handles to remove the ball link. Super simple and very cheap since a high quality tool is unnecessary. There's a plethora of choices. Bill Swingle RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.