I messed around with doing something like that, but never got very serious about it. Here is my experiment, using a rev 1 B3 filler: It's all held to the wooden frame with zip ties. The blue foam under the block provides some spring action to hold the bottle up against the stopper for supposedly hands-free filling.
What's on tap: Cream Ale, Imperial Blonde Secondary: British Amber, Primary: APA http://bubrew.org
