I vaped my protanks for eons, well over a year and half and still using PT mini's as my juice testing atty. Protanks set the stage for me to coil and wick virtually any atty. My wife still uses a PT2 and will continue for time to come, 6 wraps 30 gauge wicked with hemp fiber is her fancy. I vape kayfuns now but always have a couple PT's filled with something.
I just kept a couple pics of my more adventurous protank builds, I still have the builds but they didn't pan out as good as they could have with more airflow in which the protank lacks for lower ohm builds.
The vertical coil I might try again with rayon cause the wicking was a epic fail and just got shelved.
I've also shy'd away from microcoils with all the say about them and finding coiling a kayfun is much easier and faster using a bolt rather than a coiler jig rod. I have really found no difference in vape quality using a spaced wrap rather than microcoil but thats me.
least ways....not at that price 
I wrap spaced coils now too. They seem to not gunk up as fast/much as touching coils that's about the only difference I've noticed. Both vape the same IMO.
