Nothing I have is Dnail but it is all Dnail compatible. Most enails are pretty standard. Only the Errlectric and a few others use proprietary cables and electronics. I like the interchangeable stuff though. I didn't see the point in spending the extra for Errlectric or Dnail when the higher end Chinese stuff is so good in this area. Although Errlectric is certainly top quality stuff as is D-nail! The Chinese guys and most others are all usually 5 pin K type standard coil heaters run by a PiD and a solid state relay of varying quality. I use a G9 Omron PiD and SSD ( about $235) but cheaper ones work fine too, they just take a little longer to heat up.
I have 6 or 7 different coils most from Greenlightvapes and Carolongtech on DH Gate. and 3 different Enail controllers (same vendors). Flat, 16mm, and 20mm. I really only use the 20mm with the 20mm Liger daily, and the 16mm and Liger on my travel rig. The bent coils are just something G9 (Greenlightvapes) does. It's not that much different although I do prefer it to keep weight off the rig. Usually if you position your cable right tipping isn't a concern either way.
There is a Next gen Enail thread that mostly discusses the Dnail Halo Stuff and a little on the Liger (It's newer) or the Liger thread. Not sure if there is a general enail thread?
This is the three enails I have. The one on the left is the G9 Pelic enail I use for Travel, The one in the middle is the Omron PiD from G9 that I use everyday, That's the good one. And the one on the far right is the one from Carolongtechnologies. Any of them will do the trick, spending more money just gets you faster heat-up time and more accuracy.
