Michael, A schematic diagram detailing the specific dimensions of the riser kit & disclaimers regarding poly tanks is available on the Home Depot listing page. These items can be found under "Additional Resources from the Manufacturer". Unfortunately we have no control if consumers review the material prior to purchase. We encourage consumers to engage with us prior to purchase, additionally, we provide 24/7 technical support to assist with installation. We don't feel your comment regarding the mounting accurately portrays the product effectiveness given your statement that you "modified" the components & have installed onto a setup for which the kit isn't natively compatible with.
Sincerely,
Aero-Stream LLC