Make sure the hoses are flexible enough before you go shoving them places. Do saftey drills on the boat deck, surface and about 5-10 feet down on the descent to make sure it will deploy easy. Don't get complacent. My octo hose was cheap, but still new, a dried out rental hose may not fold the same.
Don't bother with that "streamlined rec" nonsense. If you use the 7 foot hose (it's not technical, that's a misunderstanding) it'll lay closer, more streamlined, and more comfortably. You can also forgo the elbow that ends up being another set of o-rings that can fail. Streamlined rec only exists because people are intimidated by the long scary black hoses
.
If you buy a 40" streamlined rec hose, you'll probably find it uncomfortable and upgrade to a 7 footer in six months time, only with a hose you have no use for and less money for diving. Do it right the first time.