Greg, one comment. When dealing with fixed price projects, the total dollars paid to the contractor are a substantial determining factor in whether or not the guy will fix any mistakes.
If you are talking about a few grand, I doubt that you'll get any satisfaction on the contractor fixing anything at no further cost to you.
I could be totally wrong, but from the pictures, I have to wonder if dude even really knew what he was doing. If not, you don't want him back anyway.
If it is something like $7-10K or more, you should be able to get some re-work done.
All decisions on how to correct the mistake are compared to the costs to have to take legal action. If you are successful in a legal action, you have to consider whether you will, in reality, be able to collect any money from the original contractor, and what the relationship will be like if the same guy has to re-work the project.
