A fluid-filled vibration damping device wherein a partition member is formed by fitting an inner orifice member inside an outer orifice member with the members relatively displaceable. An electrode array is disposed on the first substrate. A lift assist chair may be disposed upon the platform, and handrails may be attached to the platform such that the handrails rotate with the platform. Oil grooves are formed at the camshaft along the circumferential direction for communicating with the connecting holes. The modular test structure also facilitates the efficient modification of test scripts to account for modifications in the underlying GAPs, greatly reducing the time, cost, and resource expenditures needed to arrive at updated test scripts.