James can certainly try, but he will also face the same issues as other lockpicking methods before he can successfully hack the locks. He will find that the systems guarding the doors are very complex, so it will take some time!
The sentries can vary from 3/4ths the size of a person to twice their size and are very heavy, though James might be able to lug a smaller one back with significant help. He won't have enough time to repair them and figure out how to rewire their loyalties in the time that they're on the surface, though it could eventually be managed over time, should he take it back home. (That said, they are very old, so he would likely need to find new parts lest it shut down within the month!)
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The sentries can vary from 3/4ths the size of a person to twice their size and are very heavy, though James might be able to lug a smaller one back with significant help. He won't have enough time to repair them and figure out how to rewire their loyalties in the time that they're on the surface, though it could eventually be managed over time, should he take it back home. (That said, they are very old, so he would likely need to find new parts lest it shut down within the month!)