If you have any extra time, I'd recommend Dr. Andrew Jones's Shotgun Insights pattern analysis program. It automates the statistical analysis of real live patterns. It is very useful for comparisons of shotgun/load characteristics. It requires that you feed digital photos of patterns into the program. The output is real data as opposed to "I think ---," or "It looks to me like ---." If you haven't done so already, have a look at Neil Winston's test of one famous choke tube company's new product.
DDA