Content_ed - 9:25 pm on Dec 5, 2011 (gmt 0)
I'm not sure removing the 301's gets you anywhere. Mat Cutts did a big post about 301's a year or two ago when he redirected his blog to another site, and then brough it back.
I would 301 the new locations back to the old locations. The whole point of using 301 is to tell search engines that the move is permanent. If Google has already indexed the pages in the new location you don't send them back, they may keep checking the new location for pages they think are there for months.