Erlstn wrote:Well...I believe you but I don't quite understand it. Seems like if your wrench fits correctly, you would be applying the same tension whether in "horizontally" of "vertically"...oh well, I will just take your word for it. Thanks Again
imagine a muscle car with it's hood open. the engine is running and you pull on the throttle linkage to rev the engine. You may notice because of the torque created one side of the car will dip more than the other. This is bottom of keyway tensioning. You're turning the plug, but on a small scale it isnt turning on its axis like a drum, its more like twisting a wet rag to get all the water out.
With top of keyway tensioning, you're closer to the center of the plug, so the turning force is more.. "balanaced" like a drum would turn, but you have the side effect of lots of space for your pick because there is no longer a wrench in the bottom of the keyway robbing you of working space.
hope that was understandable...
Squelchtone