1. I think the list of stuff will all work together. 2. Since you're getting a bronze faucet, does ICE make a bronze extended flange? Or Rohl? 3. The flange that comes with the GD will be a standard flange in stainless (most likely) and not usable. It won't fit the sink. The stopper will be reusable but also in stainless or just plain black. 4. since the diameters of the flange/stopper are standard, you can buy different ones from ICE. 5. A stopper for a continuous feed is so you can keep water in the sink. It's basically a round disk with a grab knob on the shiny side. A stopper for a Batch feed also has the T-shaped bit on the bottom that activates the GD when the stopper is inserted in the correct position. I'm going to guess that a '2-position' stopper is for a batch feed model.

We eliminated the air switch or any kind of external switch by getting a batch disposal, which has its switch built into the throat of the disposal, activated by turning the stopper. The stopper can also be positioned to plug the drain or to let water & small bits flow into the drain. A batch unit does not have the rubber flange that the continuous feed units have, so it's easy to see into it, & nicer & safer if you have to retrieve anything. We have 2 Insinkerator Evolution Cover Control disposals in our kitchen, and love them.

You'd have to see how the unit was wired from the box (which plugs into the outlet, and then the GD plugs into the box) to the pushbutton. If it's all sealed connection, then no, b/c it would be really hard to run the wire (with pushbutton attached) behind the sheetrock. Not to mention inspector wouldn't allow it b/c then you'd be mudding the switch into the wall, not an approved box/device. If there were wirenut connections inside the box and you could figure out how to mount the pushbutton in the wall (still might need plastic box?), run the wires down the stud cavity and out under the sink to the box (would have to be approved junction box) then maybe. But all you're gaining here is the air gap. Ergonomically, it's the same as having a wall switch. Just looks different from a light switch. But if you really want the switch on the wall behind the sink, it would be easier to put a horizontally-mounted box in with a switch for the GD/outlet, and label it "GD" so no one turns it on while you're stuffing leftovers down the drain. A standard electrical box will fit in 4" backsplash if turned sideways. Sorry, it's been 11.5 years since I installed one of these on a tub deck and it was hardwired (not a switched outlet that you plugged tub into).

So your hands are covered in onion scraps and juice and you have to grab a cabinet handle, lean down, flip a switch, flip it back, and grab the cabinet handle to close the door. Nasty onion and juice all over. Or poke a button at the sink with one finger. Your call.