Good luck with your ride! Also, one thing I have had before was a little piece of glass that only showed up whenever I flexed the tire. If the tire wasn't flexed, the glass was completely hidden in the rubber. Whenever it flexed, such as when you would hit a bump or have it compress just wrong, the glass would puncture the tube. An easy way to check for this is to bend the tire at any points where you see small cuts and look for something shiny in them. You didn't buy really cheap tubes did you? Once, I had 2 out of 4 really cheap tubes in a pack that had small punctures in seams near the valve when they were brand new. Luckily, I found the leaks whenever I put a bit of air in them before installing.