I would not say I am an experienced plumber at all; however, I have dabbled here and there. How do I go about converting the plumbing of a single vanity sink into a double vanity sink. What supplies would I need to do this...i know the copper wire to split the water, but what about the drain? Can they both use the same drain if they are side by side? Also, how hard of a project is this? Thank in advance for any help