I thought about doing this but my main concern was not all the bottles filling in sync. But, like you said, if you can make it where they hit the same spot...it may be worth a shot. My other concern was moving a large amount of liquid up and down. I was thinking about doing the reverse, raising...
This is probably a stupid question but are you going to keep your fermentation chamber in your garage? If so, any worries about the fridge working too hard to keep a proper temperature? I only ask because I am in AZ as well (Chandler) and have been considering building a fermentation chamber but...