Goliath's tone as he asks where Lexington is very much that of accusation for his being late. The question is actually less 'where were you' and more 'why would you cut it this close,' so I love that Lexington's response blows right past that. He answers the actual question and not the one that actually concerns Goliath, though it's implied in his answer.
It is really neat to me how confident Lexington is now that the interaction has happened and gone well. Now he is assured of his choice and is determined to have the others see it like he does. It isn't until he's pretty much fully made the pitch, after he's asserted his thought process to be unquestionable, that he turns back to Goliath in this interaction and hunches down a bit, finally asking for approval.
It especially strikes me in this interaction how autistic-coded Lexington may actually be. Obviously a fixation and special interest (electronics) can't only be explained by one thing, and specifically only a neurodivergent thing, but the way he blows past the implied question, answering the actual question, and seeming almost entirely oblivious to the tension he arrives to, and then suddenly switching from that confidence to uncertainty... all that together really paints a certain picture. It seems he knows that sometimes he does things others don't see the way he does, but it's only after he's gushed about it that he has the space to consider that, and then acts as tho he really doesn't know what to expect from the others.
Just yet another thing I'm page-marking for further evaluation as the series progresses that I don't think I ever would have thought about before if I wasn't working at the show for as much juiciness I can squeeze out. XD