You seemed to be trying to use the study to justify the decision to restrict equipment, but the decision had been made 7 years before the study.
http://www.thefreedictionary.com/trial+period
Hypothesized--> implemented--> conclusion.
Do you want to be done?? 'cause I can do this all day if you want!
Part of me does, but the other part is making spit wads and sharpening pencils.