have a grand prix that one flipper is "sluggish". meaning it won't come back and return to the rest position unless you push it or the ball hits it. it's the rod assembly, not the coil, coil plunger moves freely when disconnected from the flipper linkage. so, i've removed the 2 screws at the bottom of the linkage, not it LOOKS like the flipper and rod assy should just slide apart, but it doesn't. how do these flipper assemblies come apart?