I wasn't a fan of the short, squatty, ugly stock drip tip for my Ammit. So, I made a new one. It measures 15mm tall(5mm insert, 10mm protruding). The insert portion is 12.6mm in diameter with a slight chamfer to aid in insertion. I implemented twist fins which act as an anti-spitback mechanism as well as vapor vortex. Supposedly, this should fit the Goon, Kylin, and other 810 tip tanks, but I haven't tested those as I don't have them.
I've included the Autodesk Fusion 360 file if you need to modify it to fit. Or you could just scale it up/down as needed.
I printed mine in PLA and haven't had any issues with heat deforming or burning/melting. After all, it is quite a ways away from the coils.
Should not need supports as the twist fins aren't massively twisted. 90° twist over 14mm height.
You might need to take some small strips of fine sandpaper and run a few passes through each twist slot to remove hangers and blobs. This is entirely dependent on your printer and print settings.
Other ideas - use an epoxy resin clear coat like XTC 3D on outside to make for a better mouth feel. Personally, I don't mind it being textured, so I left mine untreated.