I don't know.
The man needs to get a drill press and some good bits of the right size. Too much slop there.
This fit at the connector has to be much better, as there will be some liquid that will end up in the mod. You can't rely on epoxy as a seal as it will eventually fail if constantly soaked with liquid.
Just looks like an aluminum pill fob.
Seeing as there is no drip well, I would have switched it around, putting the connector on the flat end.
For someone building/showing their first mod it's OK, but I would be embarrassed to actually post pics if I had made it.