Can anyone recommend an additional vacuum nozzle that will not scratch soft wooden floors? (castors scratch the finish). I have the "Plastic Interchangeable Floor nozzle -452906" which is okay, but would like something a little better with more brush action. I have tried the aluminum floor nozzle (has casters) and the "plastic multi purpose floor nozzle" (which also has castors even though they were not mentioned when I ordered it!!!). I want to use this with the stainless steel vacuum tubes.