[gogo]

I'll be the first to admit I have no exp. w/block design. but an idea struck me. (wait, that was the wife) as a way to check turbulence patterns, run some dyed alcohol in with water. (not in the system! well if you want too) maybe use one of those printer refil kits to inject the dye in a slow stream using low flow water,maybe hook it up to a tap to test flowor something. kind of like a smoke test for airflow. anyway just a thought.