User blog comment:Godisme/Kill The Shadow/@comment-893506-20120613192620/@comment-1332195-20120613231133

Reiatsu maybe? The Stern Ritter are obstensibly much stronger than the regular Vandenreich forces, so if the captures devices respond to a user's reiatsu, it would kind of make sense that they suceeded where he failed.

Or maybe it's because Ichigo is special, and heaven forbid the Gotei 13 solve this without his help.

As for the last point, Quincy can manipulate reishi, so could it be in their power to modify the Bankais post capture? And can the captains get them back? I would think the latter is true.