Also, if you do it yourself, this was the most important non-obvious trick, during the "hard" part:
Get a roll of string, and cut some several-foot-long sections from it. Tie a nut to one end of each string (for weight, makes it easier to not lose the strings), and then tie the other end to the ends of the hoses and tape over the tied string with Gorilla Tape or something. Then you can drop the hoses into the tank out of the way, push the unit through, and then fetch the hoses again with the strings.
