I drilled some 1/4" holes in 1 1/2" caps
Tested the flow and came up with ~1400 GPH/Tower (2gallons in 5 sec).
Here are the sprayers.

A pic of them running.

The collection barrel after all the foam has broken down.

A new high protien drink that I'm going to start selling.

The good news is that I got that glass washed and put back away without getting caught.
Dan