Ac lines are very straight forward and easy to do, took a few hours screwing around. Make sure you index everything with a marker, take it off, and then tighten the cnc fittings to the screw on hoses - makes life easier, and less chance of it coming loose. I used some left over pag oil to lubricator washers and o rings. The biggest feat is the plumbing for the 3 way valve. It’s a pain, but I can confirm it does keep the IATs and car just as cool as if it wasn’t inline when flowing through the heat exchanger. Big test is when I get it recharged 🤞🤞🤞🥶🥶