Help with my tank plumbing diagram

[Coleus]

Well

some plumber will help me do plumbing for my tank tomorrow and this is what i am going to give him.



I was wondering if it makes any sense at all. Also, is there any flaw to it. we can't get the return line to run a good positive slope because it has to run under a bathtub between the tank and sump so that is what you are seeing.

Also is there anything i should add to make it trouble free in the future?

I run herbie overflow for my basement tank and durso for my upstair tank

Thanks