I went to my mail place tonight and picked up my third Wotofo Profile Unity Mesh RTA (SS). Also some new wicking and more mesh strips. I set it up with the new to me wicking product Vapefly Firebolt Organic Cotton. It's way easier to wick with this product, and so far has had no issues at all. Will run it for a couple of days and see if that continues to be the case. If so I can see changing to this wicking in all three WPU's (and probably also in my nine Wotofo Profile Mesh RDA's).
Daniel (DJLsb Vapes) suggests using 3 bolts stacked like a pyramid in his video review of the WPU (back on page 2).
Wotofo Profile Unity RTA
I tried 3 but found it to be a bit too tight and maybe unnecessary with the spring loaded Profile decks (in my Dovpo Mesh Pro RDA's with a solid deck they have to be super tight though). So I built this WPU with just 2 bolts stacked one on top of the other. Bottom bolt cut to outside edge of the atty base and stuffed in the wick ports - top bolt cut to the outside of the ports wall and pushed up (just like in the video). No leaks or any tell tale signs of an impending dry hit so far. If that holds up two bolts will be good enough, if not I'll go to three. The bolts are long enough to easily get two Profile builds from each of them. They come 20 bolts to a package. I bought 6 (120 bolts ought to last me awhile

).