I’m planning on making it in a couple weeks for my trip next month, so I’ll update with photos when it’s done! I’m basically making one very similar to the one StarWaresWorkshop on Etsy sells (he also makes a version for the Coke bottles too!). The body of the BB unit is 7” in diameter, so I’m going to use a similarly sized ball to create the paracord bag on.
I bought the strap on EBay (just search “two point sling”... apparently they‘re usually used for guns

) and will be using thisYou Tube video to learn how to do the paracord part:
Don’t forget to create a “leash” for the head if you’re making it for a BB unit (since they’re head can easily detach). I’ve been told a 12mm lobster claw clip fits on the attachment point on the head.