Okay, one thing to add for the Mamba. Most of the youtube clips show it attached to your skimmer with the universal adapter, then one section of hose, then the flow regulator feeding the rest of the hose to the vacuum head. Doing this allows two things. It gives the flow valve the chance to rotate and get too much air, which can stall the Mamba. What it also does, and I think this has more to do than anything with whether or not the vacuum works without supervision. Being just below the surface, there's not enough water pressure on the valve. Careful study of the overly dumber-down instructions show the connection being the universal adapter connected directly to the flow valve, then all of the hose to the vacuum head. This puts the flow valve deep in your skimmer. Now, based on your skimmer, it may or not fit. I had to tighten down the flow valve all the way to get it down in the skimmer, then back out the valve until it would operate. Once I did this, I discovered I had more pressure on the vacuum head without having to starve the drain in the deep end. My diverter was about 60/40 favoring the skimmer, which is about what I would use for the old vacuum. The best thing was that it ran all night without stalling or having to sit and watch it.