If its any help i wrote down some settings based on my 3mm nozzle being approx 2ft above water, flash delay 400, drop delay 79, size 20. Its doing my head in because every time i alter one it has an effect on another, change the drop size + or - milliseconds you then have to change the other 2, drop delay will affect flash delay time.
Larger drops tend to break into many, have look here lots of useful info
http://www.scantips.com/drops/shako/