You are right Stan, could be an issue. I did have a couple dancing around on the sparkplug while running. A solution was to give the electrode at the insulator a drop of Super Glue or epoxy to dry ......then seat the terminal upon.. That film was enough to give the base a wedge upon the terminal to hold it in place. A superior mechanical method is to drill the terminal below the wire for a eighth inch long 4-40 set screw to seat in the waistline of the CM-6 electrode. Then you can position on the sparkplug the terminal regardless of any flex or twist upon it by the wire insulation.I'm no doubt being dumb, but what holds the brass piece to the spark plug itself?