Any thoughts on opening and closing old fashioned way? like removing a pin halfway trough and then drive it back? - I admit I have not used 10speed yet. but for 8speed and single speed old fashion driving the pin (any pin) back, works just fine.
+1 on don't. Even 8-speed chaind are badly weakened by pushing a pin part way out and reusing it. These narrow chains have their pins "riveted" at the ends for strength and pushing them out removes the riveted flair and reams the hole oversize.