Re: DT fly line.
I use both. I like dt's for my small stream rods . So really I get 2 lines in one box. What I do rather than putting the whole line on the reel and run the chance of line memory when I want to flip it over. So I run out the box of new line, double it over making sure the tips are the same and have a friend walk till he hit the middle and have him but it. Then put one on the reel and one on the plastic spool.
I can cast both just fine.