You should realize that a carpet mill differs from a slat mill not only in the materials it is made of but in its purpose and the way it ought to be used. There is plenty of info to be found via google if you dont know what I am talking about. As for plans, I have seen this question posed on several boards several times and plans have never materialized. Those who have them do not seem to be interested in sharing that info. The nearest thing I have seen was plans for a cat mill. Which definately will not work in an appartment. 8O Good luck though and if you find something let us know.