So here's some thoughts on shipping options, and I'll stick to UPS, Fed-Ex and USPS here since those are the ones being talked about. I also pen this from the point of view of a person who previously owned a business that literally received a shipment Every. Single. Day. Keep in mind that USPS (generally speaking) no longer ships themselves. They contract out to another carrier. This may be what is impacting your cost, size requirements and the general "No" some of you are running into. Generally speaking, when you ship USPS, especially on a large package, they will contract it out to someone and simply collect your money and hand it off to said contractor. So you aren't actually shipping with USPS, they are just putting their label on it and collecting your money. Now, this is the part where I'm gonna ruffle all the feathers. UPS is a Union shop, Fed-Ex is not. I'm not going to get into politics here on Union vs. Non-Union. I'm simply going to state observations over a 4 year period of dealing with an arriving shipment every single day (We owned a tool business, like Snap-On and received large shipments of tools, tool boxes, etc literally every single day for 4 years). UPS was the only shop that could figure out simple delivery instructions like "Place packages on back porch" or "Place package in lock-box on side AND LOCK WHEN DONE!" UPS was also the only shop that could arrive on time, as stated. Every single time we tried using Fed-Ex they could not follow any instructions, the shipment was literally left laying where-ever they felt like leaving it and 9 times out of 10 the product showed up damaged. Also, half the time the shipments would simply not arrive until a day later, or maybe two days later. I know, when waiting on a new guitar waiting an extra day is not a big thing. But when waiting on a tool that is already sold and to be delivered the day after scheduled shipping arrival, it is a thing. We had time where we thought a shipment didn't arrive, only to find that Fed-Ex "left it on front porch" rather than in said lock-box like instructed and someone passing by helped themselves to it. We found that Fed-Ex was literally ALWAYS cheaper to ship with than UPS. But we also learned that "you get what you pay for" here. Now, as far as packaging up a guitar, here's an interesting idea that I ran into when I shipped a grill for my classic car. The guy had wrapped the grill in plastic wrap, basically putting it in a bag, then filled the box with that "Great Stuff" spray foam that carpenters use to create a totally filled, foam insulated box. the plastic kept the foam from sticking to the grill, and it held it in place during shipping. No way was that thing getting damaged! It's possible this method could be used for guitars as well. Bag it and fill the box with spray foam! Again, I'm not trying to get into a discussion on anything here. I know there are those who are going to say that we "just had a couple bad experiences with Fed-Ex and I'm taking it out on the entire company." I'm simply giving you guys my observations after dealing with daily shipments for 4 years. Take it for what it's worth, your mileage may vary.