Seems like the vacuum toggle setup works really well. Now I wonder how long it'll last.
Here are some pictures of the setup.
this is the vacuum element that controls the water valve
[attachment=2:1hr5re6q]vacvalve.jpg[/attachment:1hr5re6q]
Here's one of the vacuum elements that toggles the valve after the autosiphon kicks in.
[attachment=0:1hr5re6q]vactoggle.jpg[/attachment:1hr5re6q]
And finally, the weight, holes were drilled in the bottom to allow for pre-siphon water to discharge as to not trigger the toggle.
[attachment=1:1hr5re6q]vac2litre.jpg[/attachment:1hr5re6q]