I'm going to carve mine up this weekend. The slots do aid when screwing that coil head down though, so I must plan accordingly..
Looking at this closer, I'm not going to wack the top of the slots off at all, just deepen them a little. In fact, if I were TempestTek, I would have taken a cue from Vision's Stardust, and made the airtube coming off of the coil head, a tad bit longer and incorporated a silicon seal so it mates up with the tank top. By sealing the air tube against it, the vapor does not have a chance to escape while taking a draw. The only way I can achieve this now, would be to shorten the tank body a few mm, and increase the thread depth the same. I may try and rape some seals from something else, to try...
A little chamfering on the wick holes, both topside and underside, is defiantly in order..