A method and system for fitting a multichannel cochlear implant system to a patient increases the percentage of patients for which stapedial reflexes can be obtained, and increases the accuracy of predicting the \u201clive speech\u201d comfort levels of the patient’s fitting programs from the stapedial reflex. , the insoluble matter is 1% by weight or less based on the total polymer, and a composition containing the same. The capping layer preferably is a HfRu composite where the lower Hf layer serves as an excellent oxygen getter material to reduce the magnetic \u201cdead layer\u201d at the free layercapping layer interface and thereby increase dRR, and lower He and Jc. The source of fluid at elevated pressure has a limited volume for initially treating the slurry within the chamber. The initial contact surface is substantially convex, so that liquid reflecting off the surface will be travel in a direction away from the flow of incoming fluid.