I love flat heads, as you can really wrench down on them without any worry of stripping it. Hex grubs are ok, as long as they are of good quality. I have stripped out wayyyy too many hex grubs, basically turning the hex into a circle, trying to tighten my leads for a solid connection....sigh....thank god for the little bag of extras though right? ha.
Anyways, to the OP, my friend just picked up one of these ammit attys, and man...the flavor is AMAZEBALLS...decent clouds too, especially for a single coil device. Now myself, being a HUGE fan of team single coil, I am definitely going to check this thing out...My go to atty is the original GeekVape Avocado 22mm, in single coil using the ceramic block. BEST flavor hands down out of ANY tank I have ever vaped, and I have vaped on 30+ different attys. I really like single coil, as it preserves juice consumption, battery life, and building materials. I have always been able to get flavor just as good as any dual coil setup provided I use an ample build. I always rock fused claptons, aliens, or any type of coil that has multiple channels for the juice to travel through, and self wicking properties, which provide a boost in flavor compared to standard round wire builds.
If anyone else has vaped this bad boy, lets hear about it!