Coupler Spring tool - need ideas

[doctorwayne]

The easiest way to replace the spring is to use the #7 X-Acto blade (with the handle, of course)  and gently slip it into the spring, close to one end, where the coils are close together.
You then place the opposite end of the spring onto one of the nubs (on the coupler shank or on the knuckle) then gently compress the spring, and align it to the other nub, and gently slide the blade from the spring.

Wayne