Just got my new Typhoon RO/DI unit so I'm excited to start making my own water as opposed to going to the grocery store to fill up jugs. Should have done this a long time ago. Anyway, I'm curious how everyone that has this has installed the drain line. I'm going to be using the drain saddle attached to my bathroom sink drain pipe. It's a metal drainpipe so what's the best way (and drill bit) to create the hole? I know it has to be a 1/4" bit but what are the best bits for metal? And is it even ok to drill through a metal pipe? All the installation instructions that I've found online appear to be drilling through pvc drainpipes. Just want to make sure I do it right so I apologize for my lack of handyman skills.