First of Paul S and the other fellas were great. They were informative, helpful. No complaints about them. Salesperson Tom B also excellent.
However, they had to use poor quality materials i.e no connectors at joints of plastic channel - duct tape used to hold joints together. Corners and all other cleanouts kept in place using duct tape until cement hardened. With engineers I would think it would be a better quality materials used.
We will see how it holds up? Time will tell !