Untwisting by hand? Holy crap! You didn't get your drip lines on a spool you could unwind?
Does this line have built in drip-hole emitters or do you go back and install them by hand? (sorry if you explained it by I am not using the audio here at work.)
It is pressure compensating drip tape,the emitters are built into the tube.It comes in 1000' rolls.So far I have not found a better way to lay it out.I do need to build a spool to wind it up in the fall.