I just installed a toto drake according to their instructions. The tank was touching on all three contact points until it filled with water and now it has leaned forward . The instructions state to place a rubber washer inside the tank and then on the outside of the tank place a metal washer and nut before you place on bowl, and then place another washer and nut after you place it on the bowl. So basically it seems to be sitting on a nut when you place it on the bowl. Your instructions on this forum does not mention this extra step. The tank is wobbly now and all nuts are tight. What am I doing wrong?