I am really interested as well. Have you done it yet? If so how did it work out? If not I guess I may be the first one. I have seen 1/2 outlet sumps online for under $30. Thats what I will get and just run 1/2" line up to the lift pump, where I will have to shrink it a little. Not a big deal really. And I plan on running a electric push pump right next to the rear tank (getting rid of the front one).