SouthSoundTree
Treehouser

I made 2:1 releases cheaply.
This is a fine entry level set-up. We've used halibut line to hit 150' shots a couple times with this release. This requires a pole mounted fishing reel.
If you are going really high, use the fishing line to pull in the throwline, then the rope.
I just found these pictures. Hope they help someone.
Scrap cord is hitched to the pole base and run up and through the rectangular hole near the swivel on the Panic Snap http://www.horsetackco.com/panic-snap.html?gclid=CIjXlauvkbkCFYdxQgod7S0Abw#.UhYucpJQEqI ($2 here). The hitch is a VT tied to the rectangular portion. When the rope is pulled through the Rectangle, it acts as a hitch minder, advancing the hitch.