What’s this?

As for previously purchased PVC board (http://blog.so-net.ne.jp/hawaiian_life_e/archive/20051221), I could not find any factory who agree to fabricate racetrack flume from the plan in economic price. So I fabricated it by myself for my study spending a little bit boring time during Happy Holidays. This is not sophisticated one, because available tools were just plastic cutter, drill, rivet gun, epoxy cement and silicone. It took longer time than expected to finish, because it’s still difficult to for me find the place where I can get what I actually needed. Now my office was filled with chemical smells due to these cements. I tried to offset these smells by Asian incense, but it turned into another weird smells…. Tomorrow, I’ll probably try to fill water inside. I’m scared that water is leaking out… How it turned out?