IPC at JFK at times takes a very long time to process.
I asked my local letter carrier about that last month and was told that they probably only have one or two people performing the clearance job. If they're off for whatever reason, everything sits.
You'll like your light once you get it.
On the lithium battery front, Keeppower 14500 840mAh cells are too long. Efest 14500 800mAh work fine. Also, lube the threads with silicone dielectric grease. Same for the switch.
Thanks for the heads up.