Let me clarify this a little more, Flavia. Of course I would provide ventilation for my BTS if I used a rack system, I would drill a lot of holes in the containers. And when I was talking about mounting the lights, I was saying that I would mount a fluorescent light fixture on the inside wall of each enclosure. But you don't need to worry about the me using a rack system at all now since I've decided to just construct my own enclosures. I just wanted to fully explain to you what the rack system would've been like. I would never have dreamed of not providing light or ventilation and would even have strived for height to be used for climbing as well. But since I can't find any plastic containers big enough for BTS, I've totally scratched the idea of a rack system and am now going to build large, spacious enclosures. So you don't need to worry. Once again, I tried not to sound offensive, I just wanted to make everything clear.