For those of you who have the Central Vacuum System, can you tell me whether or not you find it beneficial to use on hardwood flooring? We were told that we need additional inlets because we change the configuration of the Rome floor plan. The system comes with at least 7 inlets and beyond that you must purchase them, if necessary. We are not interested in paying any additional money for inlets that we may never use for the hardwood flooring which will be installed on the entire main level. Please share your feedback/experience. Thank you!