Alright JJ, you asked for it
The first problem we found is the threaded ring on the drip tip ends up getting stuck in the top of the tank. The cure for that problem is to get the threaded ring out of the top of the tank, head down to the local hobby shop and buy a small tube of medium CA glue. Glue the ring back onto the drip tip. Problem 1 solved.
Next problem we discovered, on top of the ceramic heating element holder is a silicone cap with slots on the sides for the wick to stick out of. The slots are not deep enough, as the drip tip is tightened it compressed the silicone cap and chokes the wicks.
Solution: remove the silicone cap (easier to do on the rebuildable type) and trim the silicone cap slightly above the end of the slots. I use an exacto knife. Even with the silicone cap trimed, you still have to be careful not to over tighten the drip tip. We found that you only need to tighten it so that it makes light contact with the silicone cap.
Now - onto the new tank!
I have found that the new tank has none of these problems

It's a new Vision and is rebuildable. Their on my website under tanks.