The first Sentinel book had a few unanswered mysteries. One, and probably most important to the reader, what was a damaged Sentinel doing in rural Wisconsin? Two, and definitely more important to Justin Seyfert, what happened to his mother? He and his brother Chris live with their dad. Their mom is never seen, and never mentioned by anyone save his brother, who asks at one point if his unexplained headaches were the reason she went away.
So, borrowing a hairbrush his mother left behind, Juston's got the Sentinel scanning for DNA matches as he travels the countryside, ignoring the fact that the boy who "saved" his school from a giant robot attack suddenly vanishing without a word is going to create a news frenzy, not to mention a lot of panic among his friends and family.
But part of the reason he bailed is the guilt over all these people praising him for a heroic act that he orchestrated. At this point, Juston is just trying to fix something, because he doesn't know how to fix that mistake. Well, he does, but he doesn't want to spend the rest of his life in prison, which, fair enough.
There's a scene in the first issue when Juston, seemingly having decided he'll give up the Sentinel, is trying to figure out how much evidence there is of what he did. Turns out the Sentinel's been recording almost everything, so the answer is, "a lot." This continues the theme from the first series, that Juston really doesn't understand much about this machine, or what it can really do. It tells him it can't self-repair, but later on, it repairs its eyes when they've been damaged. He eventually gives it an order to protect him, and it seems to comply, but who knows how long that's going to last.
Reviewing the recordings is a gut punch for Juston, as he's confronted with how close some of those attacks came to hurting his friends. Desperate to get away from the guilt, he stumbles onto a recording of the Sentinel dropping some guy into a lake. It's not anything Juston recognizes, so what's the deal?
The deal is, an officer involved with the Sentinel program did a favor for an old school chum-turned Senator. Kill his opposition, secure his election, get a nice promotion. The Sentinel was supposed to self-destruct, but it apparently didn't destruct entirely, because here we are, with those two trying to cover their tracks by unleashing an experimental Sentinel.
Juston, not getting the answers he hoped for, eventually returns home where he has to actually talk with his dad and protect his town from the other Sentinel (not necessarily in that order.) He's still hiding the Sentinel's existence from his family and friends, and any hard feelings his friends or little brother have about his vanishing act are not dealt with (although McKeever consistently wrote them as just worried about him, so that tracks.) There was also a subplot about Jessie, the cool older girl Juston had a crush on, getting annoyed with Ashleigh, who had latched onto Juston when he became a celebrity. It seems like there was a whole lot of history between the two of them that was only hinted at as well. But the book only had five issues to work with, so some stuff was just going to be cut out.
After this, I'm not sure Juston appeared until midway through Avengers Academy (right about the time I dropped the book.) Then he got killed in Avengers Arena, though I understand he was shown as alive again recently in some X-book. I think one issue for him being active in the Marvel Universe (besides Sentinel's history as genocide-abetting machines, which makes team-ups awkward) is he's not bad at mechanical things, but he's not an inventor on par with Tony Stark or Moon Girl, or probably even the Tinkerer.
The Sentinel is a pre-existing weapon Juston found, and it does a lot of repairs itself. Maybe if he had more resources than hand tools and a scrap yard he could do more, but up to the end of this mini-series, he hasn't exactly demonstrated the level of know-how non-powered scientist type characters need to survive in a super-powered world. He can make a Battlebot the size of a medium-sized dog, but an exo-suit or a giant robot seem like they're beyond his capabilities.
If he continues to rely on the Sentinel, you can use bigger threats, and maybe continue to expand (or develop) the Sentinel's personality, but you have to show what Juston is bringing to the partnership beyond just ordering the Sentinel around. If you ditch the Sentinel, you probably have to keep Juston facings smaller-scale threats he has the mechanical know-how to cobble together a counter for. Which you could probably do, if you left him in his hometown in its own little bubble. Which gives you the advantage of his supporting cast for non-crimefighting stuff, but that kind of stuff seems to have limited appeal among the Marvel comics' readers. They want BIG and IMPORTANT. And I don't think the occasional team-up with the Great Lakes Avengers (or maybe Alpha Flight if he's close enough to the border, although that could be trick given current tensions) would offer enough of a boost.































