As far as I know.. I've read loads bout this guy... astro physicions etc.. find no flaws at all in the story...

The black hole energy sources etc.. combustion all check out..

The only one flaw thats found has been this..

He mentioned that the whole machione weighed like 300lb.. the two black holes weighed in at around 120lb each or some shit... therefore the rest would weigh just 30lb.. which some have found unbelievable...
Air force personell at the highest level concluded that the machine is made of Army type features etc... all feasible...