All of my 8, 9 and 10sp ones (which is about 8 bikes' worth, and the tandem has about half a dozen of them) seem to be of the same design and are perfectly happy being undone. I've never come across one which isn't.
http://www.sram.com/_media/pdf/sram/dealers/TM_RoadMTB_MY09_E.pdf
10speed powerlock are one time use only and requires removal with chain tool..
but if you are reusing them then that is one in the eye to SRAM!;-)
either way the Wippermann Connex system is easier and the the chains last longer than the SRAM ones
