They are pretty shallow IMO about 50% deeper would make wicking easier? Anyone tried/done this? Thoughts?
Would prefer to see your build deck before making suggestions.
More than a Few Kayfuns and Russians have been Modified because the user was inexperienced at wicking that style tank.
Aside from a VERY crappy machining job(seen a few) these should not need grinding.
I have changed my wicking method from the YouTube Tutorial I was using. Now my Rayon Wick is working great on a 1.8 Ohm Coil at 10 watts^^^^^^^what he said^^^^^
It doesn't take much to make a big improvement. Mine aren't that much bigger, works great now. ( hi PG and 20 watts here)