I made the driver, indeed a NANJG-92 driver made from a qlite revA, as invented and described by comfychair. I'm very conservative and still do not trust myself building a BLF 17mm DD driver, although I have all the parts in house. And I find it sort of neat that the NANJG-92 can be made without reflowing, just a solder iron does the job. I made an 3D animated gif of the build 
(a BLF-first! ....and probably last, making the gif took more time than building the driver :tired: ). Try to parallel your eyes to make the 3D work:
