Just purchased rachio...setup with my indexing valve as phase 1. Works great. Now I want to swap my indexing valve out so I can control each zone. I have four zones. If you look at the picture my original thought was to remove the indexing valve and put a four zone mainfold in that spot. My concern is that it will be a tight fit. It's 16.5 inches from main supply pipe to the wall. Other option is to move the anti-siphon valve over to the left to give more room for the zone valves (I'd probably also remove the master control..unless there is a good reason to keep). The closer the anti-siphon valve is to the wall the better as it's hidden and this is right by the walkway to the front door.
Here's the current layout: https://goo.gl/photos/tVYe4gQPtvqjCquw9
So questions are:
1) Any thoughts in overall layout..ideas I haven't thought about or things I should do
2) How much space to I need for a four zone manifold
3) Any benefit of keeping the master valve especially on that side of the anti-siphon valve