Shipping through the USPS

I have been shipping alot of parts through them and have had a few mishaps,One to canada took the scenic route through Germany but finally showed up, One got smashed( shipped ground with no insurance ) so I had to eat that one. One went M I A (priority mail) so I filed a claim one line expecting them to tell me they wouldn't cover it . But got a check in the mail today. Amazing. Moral to the story is Ship priority if possible.
Retired from that toilet. Once the USPS made the deal with FedEx there was no difference in speed between Priority and Ground. Everything got loaded into the same FedEx pod at the USPS and got moved by FedEx airplanes. Don't know if it is still the same.
About your smashed box. When my wife initially got injured while working at the USPS she ended up doing parcel repairs. Damn near every box she repaired was due to the sender not stuffing the box FULL with packing material. You leave any open air space in the box it may become crush space. Very little, if anything, gets handled by hand anymore. The APPS machine has a hydraulic arm that swings out to kick your package off the conveyor belt. Leave enough open air space and here is the first place it can crushed. Your package may be the first to fall into the empty BMC...the internal container in this image.... bmc.jpg the next thing to fall into it could weigh 69.9 pounds..needless to say what will happen if your package has any open air space and it is in the drop zone.
See lot of people bitching about crap getting wrecked "by the USPS". The USPS does its customers a very large dis-service by not educating them. No open air space. Tape the flaps of letters shut etc. I used to run the AFCS. The machine that cancels the stamps. On average I cancelled 30k letters an hour....which gives the machine a very little time to read and decide which bin to put your letter in. The answer? Use printed labels. If the machine can't read your sloppy *** hand writing your letter goes to the reject bin. Which means it gets ran again....and again....and again.....until it is a tattered mess. Then it goes to repairs...which sometimes sit for a while...