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hy..i'm italian...so excuse me for my english..this is my idea...i want to build a cleaning robot based on this robot ...what i want to do is: build thant robots and put under it one of this:

...it's a robot for my mom :p...what do u thing? and can u tell me  shop where i can buy all what i need? because i'm in italy and i prefer to buy from just one shop for shipping cost...thank u!!!