I tried an experiment with lining and not lining the slots up...I use one layer of liner and it did not make a difference in my case.
I state this with all due respect to Bikenstein. Since I only use one layer of the liner there is more than enough space for the
juice to flow for a more than adequate vape.
But, as with all things, if it works for you, go for it.
I sit and wrap 20-30 coils at a time. I'm glad I don't have to concentrate on lining up the slots...

I also took a pin to several stock coils to see if they line up the slots...it seems to be random from the factory too.
But, that may have changed also.