After brewing on the new system a few times (3 in total so far) to ensure that all the design and concepts work as expected, it's time to go back and fill in a few additional items. The first is the hop-back, originally I was planning to make it an enclosed (pressurized) system, much like the Blichman Hop-Rocket. However, after research and reading, it appears that many Hop-Rocket owners run it up-side-down with the top open and get good or better results using it that way as a hop-back.
Not having the hop-back fully enclosed made it much easier to design and make, however it does require monitoring while the kettle is draining in case it gets clogged, the pump slows or the wort from the kettle is is filling the hop-back too quickly.
The hop-back has 2x perforated stainless inserts, the first/bottom one has 3 stainless bolts that act as a stand-off to keep the filter above the base and allow adequate space for it to drain without issue.