I know this much, I don't know chit. I started throwing string with a 2 hander back before anyone had named it Skagit casting or Skagit lines. Somewhere along the years I heard about Scandi lines. WTF? I don't think I have ever seen one but I wouldn't know because I wouldn't know one if I did see it. My fishing partner uses a DT line on his 2 handers. I have cast it a few times and it works to get the fly out. I am still using lines I made over 10 years ago. The only factory line I ever had was a wind cutter. Used it one day and sold it. Every line I have for my 2 handers I made myself except for one which I think the Sultan made. I guess my lines are considered Skagit lines but I don't know for sure. I play with lines until they cast the way I want them to. I listen to others who make lines and try their suggestions; if they work I keep doing it. Good work Brian and Mike. It helps people understand what this 2 handed stuff is. Some like to analyze stuff. Some like to try every new thing that comes along. Cool. Whatever throws your line. I guess the more information we get out there the better. Personally I like it simple. No taper at either end to speak of, just line that flies out the guides when I want it to. Skagit, Sacndi, long belly, short belly, DT, whatever. It’s all good.