I've got both too.
The Kayfun is an easier build with cotton, ekowool or silica.
Having said that, the build I've got now on the RSST is equally as good as the Kayfun. SS rope, with a cotton sheath on top and a 2.0mm mini coil. Airhole drilled out to 1.5mm. The rope just needs an occasional torching, replace the cotton sheath and dry burn the coil - takes all of 5 minutes to do. I've got loads of the rope that I'll probably never use, seems like an everlasting wicking material to me
Never had a dry hit, flooding issue and I can literally vape the tank dry. I don't store any PV on it's side though, so it may still leak this way.