They guy didn't seem to know what he was talking about, it took three tries and 45 minutes to build my Igo. It was only single coil and he didn't even have the correct drill bit I wanted it drilled to. He didn't tell me that my build would cost a full ten bucks and I didn't even notice the sign that says they charge for builds they had tucked away in a corner with very difficult to read print until he was halfway done. As he was drilling he said I hate drilling out airholes. If the customer needs something, you don't tell them you hate it. You just do it. Especially if it costs that customer money he didn't know he'd have to use to pay for a subpar service. I'm all for tips, and I usually build my own coils, and what I needed done has taken me only ten minutes. Not 45. I definitely won't be returning to DIY Flavor Shack