Duane said, "Also getting ready to do some research with Dr. Lewinski next fall on psychomotor skills and deterioration over time. Specifically how soon do arm bar type skills and shooting skills for police become less effective and eventually ineffective over time without practice."

Please post about this one while you're doing it, if possible :-). Interesting to see how this research progresses, and what problems you encounter doing it. For example, are you studying retired police officers, or ones who have quit the force at a younger age and so don't practice any more, or...?
God grant me a good sword and no use for it. -- Polish proverb