IRIS Quadcopter Arm

This is an arm I modelled based on the IRIS Quadcopter. I was using it for a finite element analysis project. The objective was to determine the resonance frequencies to see if any of them overlapped the operating frequencies driven by the motors. ** I stress that it is based on the IRIS arm. I had limited access to the actual model; I was mostly working from photos. So it is ball park at best.