[DNA250C charging but the it can't connect to escribe for update, pc could not read]

Some USB cables are "charge only" in which case you'll get that message and be unable to connect to escribe even though the mod is drawing power. Won't happen if you use the cable that came with your device (one for my phone works too).

[Rebuilding the POD]

I tried that too after stumbling upon a how-to video on YouTube. I gave up in frustration after an hour. All was well and pretty simple till the very end where the coil is installed and the wick just needs to be pulled through the tiny holes into the juice chamber. Maddening! Next time I'll feed a length of wire through through the holes beforehand to attach my wick to and fish it through.