No it's not rude at all and I appreciate anyones input on the situation.
The equipment ratings show that this will work, but real life experience is proving otherwise...
The eshopps PF-1800 is rated at 1600gph max.
The "Wet Set" Krystal Clear pool pump/filter is rated at 1000gph.
The rating on the pump is most likely without filter insert as most companies list without media for a more exaggerated and impressive number. It currently has no filter insert as it's purpose is not to be a filter, simply a pump.
With the nearly 4ft of vertical head, plus the additional 4ft of head accuired from the 4 90° elbows on the spray bar, the pump should be well below the "rated" 1000gph.
The issue with the overflows capability to handle the volume of water was worse originally with the overflow being configured as instructed. I have since then modified the u tube placement and stand pipe height. The overflow still did not handle the unadulterated flow of the pump before adding the spray bar. But the spray bar only masks the true problem of the overflows short comings.
The new pump will be 1920gph and real world flow will realistically be 1400gph with the amount of head present.
BTW, the plumbing did handle the full flow of the pump when run directly into the backside of the overflow box, not using the siphon, and handled it without issue. The box in fact almost stayed empty with no build up of water. So the flow there is plenty sufficient...
Any other ideas? Lol I'm still lost...