JGJAM, how's it going? The answer to your questions are, yes they are sliding doors and to keep the seal I really didn't do much. I just made sure that the doors were close to each other, by this I mean the middle where the doors overlap when closed. There isn't any give when the doors are closed, they don't shift back and forth when I slide them open or closed. When I went to have the glass doors custom cut, I took a sample of track that they sit on. They made sure that they chose glass that would fit the width of the track. They did an awesome job cutting the doors to size and boring the holes where I put the knobs. The three most expensives things that went into making the humidor were the spanish cedar, glass doors, and the cigar oasis humidifier.
