Bought a Toto Drake (2-piece)earlier this year, installed it all fine. There is about an inch gap between the tank and the wall it's on. The oddness is that the tank isn't completely stable as it kind of wobbles when pushed, especially since there is a gap to the wall. I reread the installation instructions and made sure I did everything correctly, but I don't think this is normal. The tank is connected to the bowl via 2 brass bolts. This is the order from top to bottom as per the instructions and what I did. Bolt rubber washer tank bottom bowl top brass washer brass nut It really warns you not to overtighten, so I really was very careful to simply tighten it enough so water doesn't leak but I'm wondering if I should simply tighten it some more or is the wobbly thing normal? Right now, I simply jammed some foam between the tank and the wall, but it's not a permanent solution. Think I should just tighten it some more? Jay P.S. BTW, the Drake is the best toilet I have ever used. It is awesome, I have never had a clogged toilet in the 8 months of use, which is infinitely better than the American Standard el cheapo model it replaced which was there when I moved in.