How about serial number verification? Recording the information on each gun in a firearms register (dealers still have to have them). Verifying that each order is complete and correct (eg: 2 rifles, one wood, one folding, 10 mags, 1 sling, 1 handguard)? verifying that there is no damage or issues with build? Confirming PAL numbers? Yeah 2 hours, sure. As far as farming it out goes, I'm not aware of any bonded warehouses with business firearms licenses, so that could be an issue - trans shipment is different than splitting a shipment out and shipping it, and as noted, that wouldn't meet a few of the more restrictive requirements for dealers. I wouldn't trust anyone, regardless of bonding, with the future of my business and my future freedom - would you?
PS - I've never seen the Chinese use skids in firearms sea cans, so it's all hand bomb.
I guess you just don't know what you don't know.