User blog comment:Ultimate omnitrix 10,000/third omnitrix?/@comment-68.71.173.10-20120727021459/@comment-3096633-20120727024106

Or unless there is a situation where it would be needed like the final battle against the highbreed. Also Azmuth did monitor the Protype Omnitrix and Ultimatrix so in a way Ben tested the two for bugs.