Can anyone direct me to a clearomizer that has a true rebuildable top coil? My wife prefers a top coil ( Kanger T2s specifically) and I am seeking a clearomizer that I can rebuild, not replace, the coil head. If possible would prefer to keep the size in the same range as a ego clearomizer and avoid larger tank sizes. The inconsistency of performance from the replacement heads is becoming annoying not to mention unnecessarily expensive. I believe I can build her a better tasting and performing coil myself as this is what I do with my Evods and rba's. Any suggestions would be appreciated.