I really don't think it will come to that, because, like you said, the guy knows he messed up, or does now once he got the report back from the guy who concluded "Rip it out." But if it comes to it, you might check with your states' Contractors Board (I believe both FL and MI have one). Do a little Googling and see what pressure they can wield against misbehavin' State Contractors. You don't need to file with them yet, but a few quotes about what they can do, injected at the right time into conversations with either your PB or his sub, might nudge them along a little faster. I found the CA code online and it was quite easy to read and understand. I'll be using the code numbers my pool guy violated in a letter to him. My instinct is that is going to get results. I'll let you know...
Point was: in California, if you sue a Contractor and win a judgement, and the guy won't pay (they have 30 days to pay, here), our Board will suspend their contractor's license until they pay! Yep. They go out of business and can't work. Now, that might be counter productive if the guy is living day to day, so I'll have to weigh that move carefully, but certainly the threat of that, backed up by the code number, will go a long way, again, should it come to that. If I sue and win, I'll get paid or put my guy of work. See if that's true for you.
IMHO, I think widening the cuts and putting in some sort of inlay could be cool. Though I'm not sure how that's going to fix the line you said was 10" askew. If that's right, and they make the cut that wide to hide it, that could be cool, too. Though I'd then want all the lines made that wide, to look right, and I'd want them placed around the entire deck, like they were meant to be there, not hiding something. If it was designed right, I suppose even inlays of varying widths could look good, too. However it's done, that seems like a reasonable solution/compromise that could leave both parties walking away feeling good about it. And that is ultimately what you want.
One caution to consider...
My deck is done just like that. I have flagstone coping* and inlays to match:
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I LOVE them. And they don't have to be straight, necessarily, they could be curved or skewed even. Could be done in such a way as to add some personality to your concrete that you might not have originally considered. Sorry, showing off. Point was: there is an expansion joint running around the entire perimeter of the coping. It's rubbery, and allows for the problem when butting concrete up to stone, which is: they don't expand and contract at the same rate. The expansion joint takes care of that. Now, my inlays were not set that way, they were put in with mortar, and now the mortar is popping out or pulling away, cracking here and there, for that very expansion-problem reason. I asked the tile guy that worked on my remodel if he could fix that, and he said not to put mortar back in there, but use the expansion stuff (which I happen to know how to do). So... if you're going to fix your deck with inlays, make sure the installer accounts for this issue in some way.
*Flagstone, by the way, at least the type I have, is awful for coping. I absolutely LOVE the look, but it deteriorates from the water, and the salt, and turns back into sand (it is, after all, just compressed sand). I had the problem solved, so if anyone has that problem, I can tell them how to fix it. But it wasn't cheap. And my stone has a gnarly, jagged edge, which I also love, but isn't particularly kid friendly. I didn't build this pool, but I do like what the previous owner's did. I'm just not sure I'd do it exactly the same if I had it to do over.
And you might keep in mind, should you do something similar to solve your issues... you might be able to see them from space!!
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OK, one last thought, a little holiday inspiration, then I gotta go get my turkey on!! The debacle with my pool guy has been incredibly stressful. I got physically ill. Went on for months. And not because it was so bad. In the grand scheme of things. I didn't contract some horrible disease. Nobody died. Life on this planet will go on. It was just a few thousand dollars of plaster, after all. No, it was because I just get worked up over such things, and let it get to me. But now that it is coming to it's conclusion, whether I get any money out of the guy or not, I can look back on the experience and see the silver lining. I have a brand new pool! It looks 100x better than it did. And the plaster guys fixed some other things about the pool that I didn't like (they deleted the drains, they added directional eyeballs, etc), and I've come to realize that this knucklehead has actually done me a favor, in the long run. I have a better pool for it, and he might have to pay for most of it! And... it led me here, to TFP, which is going to allow me to maintain this pool myself and keep it looking amazing, for the rest of my life. Not to mention saving me about $50K in pool maintenance costs over the next 20 years or so. Now, I don't mean to lessen what you are going through, what you're feeling is real, but my holiday wish for you is that, in the end, you too will be able to look back, be proud of what you accomplished, be proud of the way you fought for it, and end up with a nicer pool than you would have otherwise!
Cheers, and Happy Thanksgiving all!!
To your first point, I really don't think it will come to having to sue anyone either...God I really hope not. I will however take your advice and seek out my state's contractor's board and at least gain some knowledge so I can have a little ammunition.
Your pool is gorgeous! I'm so happy for you that things have worked out for the best. I absolutely LOVE your flagstone coping and how the inlays were done. Gives me hope and inspiration! Love your jumping rock too, I'm sure the kids do have a blast! Our pool is only a little over 6' in the deep end so would worry the kids may hit bottom?
I do appreciate all your advice and encouragement Dirk, you've been extremely helpful. Love your attitude too, when life hands you lemons..
I hope you had a wonderful Thanksgiving. Ours was very nice. As, not so pretty as our pool is at the moment, we are extremely grateful and thankful that we were even able to put one in. I know in the end, we will have tons of fun swimming next summer with our family and friends and that's what it's all about. Once we pass the hurdles and tribulations that come with most pool builds, all will be good.
I do have to ask though, if you can share, what happened to your plaster redo project? The pic is slightly far away so I can't tell too much what it looks like. What color did you do in there?