I purchased a stainless replacement tank for my nautilus. I am unable to use it because the upper hardware will not fit through the threaded part of the tank. Looking at it indicates that the threads on the screw part are slightly too large and the lower portion of the upper hardware (part that connects to coil) will not slide through it. Since these tanks cost $15 and my retailer will not replace opened goods I was hoping that aspire would replace the tank or upper hardware with ones that fit. I can provide video of the issue if you would like to contact me by email. Thanks for the help.