Hi!
I had one too, but I think it was a bad design, I donât think it can be built so it doesnât leak. I tried with different wicking too (I pulled 2 layers off another cotton pad and assembled it that way), it didnât last even a day, it leaked 
It might also be a problem that its diameter is large, and the liquid pours into it.
Unlike a Vapefly Kriemhild 2 RMC
Or the Wotofo smrt coil
While I had it, I pondered on it, that a very thin, perforated steel ring would be needed, which I would slide onto the Deck after cutting the Mesh cotton, slide it up to the edge, turned, it just needs to be very thin, but at the same time easily removable.
The Voopoo PnP-VM5-VM6 0.15ohm atomizers gave the idea, where the outer sleeve is pushed on in such a way that it is half turned, thus regulating the amount of liquid flow,
or make a steel reducer sleeve into which you put the cotton and the Mesh sheet, and the mesh sheet still fits because we narrowed it by 1mm, but this might be just enough so that it doesnât push in too much liquid, only as much as needed. Then engrave the holes and the groove for the cotton with an engraver.
It can definitely be made so it doesnât leak, and thereâs no flavor loss either. I think itâs hopeless to have a deck like this milled with a smaller sleeve size for financial reasons, it wouldnât be worth it, otherwise it could be done, by scanning it and milling it with CNC.