Just wanted to stop in and say hello. Also wanted to provide a little info on rebuildable tanks. I recently received 1:1 clones of the Russian 91% and kayfun lite. The main reason I'm writing this is due to my surprise regarding how tight the airflow was on both. I say was because I drilled both of them out. They were far tighter than I expected and much tighter than the nautilus mini. I was able to open the Russian more than the nautilus but that was not the case for the kayfun due to the hole location being too close to the edge of the deck. I opened it as much as possible and even drilled the center pin. It is 100% better but still not as good as the nautilus. The only reason I'm comparing these things to the nautilus mini is because it is readily available and has adjustable airflow.