The valve is a HR Textron 27G50F-5A02. I was speaking to Donald yesterday, and he actually knows the setup we have here and he did say it was a difficult valve to work with 
Tuning_Force_Oscillations_Unfiltered_5.rmcplots (312 KB)
Tuning_Force_Oscillations_Unfiltered.rmcplots (2.96 MB)