Really depends on the manufacturing cost of the pump vs. the cost of shipping it. One of the really interesting things for me with the rental model is that if t

Really depends on the manufacturing cost of the pump vs. the cost of shipping it. One of the really interesting things for me with the rental model is that if they kept the timer circuitry in it, they'd be able to collect a LOT of wear data. You can do in-house testing, but getting access to that level of field data is hard.