My stick blender is wearing out. Not the motor but the metal on the piece that comes of to wash. before I put more $ into another small one I would like to get some feed back on a commercial stick blender. Anyone use one? I make187 oz (oil only) batches at a time. I would love to double that and fill both of my molds at one time. Can you give me feed back on a commercial sb or should I just buy a new small one.