I like the way each line has its own hole and none are sealed,what a great time saver, three small holes would be way easier then having to get a core drill to make one hole for all the lines. Those extra bends in the lines must be the new technique for vibration noise canceling, and it says high efficiency so 14 gauge should be plenty big enough, right.
Yea try using just acetelene to weld the connections- Seen it done when the guy ran out of oxygen. My neibor had some hack fixing his ac and trust me way worse than that, Unit just runs and runs and leaks out freon constantly. So I give him my card but he never calls I think it's a race thing.