That is a fine sci-fi concept, but does leave us with at least one of the hard light mysteries. Why was Howard hard light? Legion was an amalgam of minds from Kryten's time, who couldn't have invented hard light until the 23rd Century. Without time travel, hard light isn't available during Howard's lifetime, or even soon after it. So we need to explain how Howard was still around, working as a vending machine repairman, so far in his own future.