What are you all using to ship your amps back to HQ? I have a MKIII that is due for maintenance and I am trying to figure out what to ship it in so it isn't damaged in transit.
ship the chassis only. use cardboard and slabs of foam from other packing to make sure there's at least 1.5" "solid" protection around the chassis on all six sides, and that it can't move at all. don't use any loose fill.
for packing material, heavier tech stuff like desktop computers, servers, and UPS devices often ship with sturdy foam pieces that are already designed to protect rectangular-shaped things
If you have an actual mesa box,that's the best bet. Ive used the same mesa box to send a mkiic+ and a coliseum to them..The box is already form fitted with foam and they actuality pack the head upside down.
I also wrap the power tubes with bubble wrap and tape it all in.
If you take the insides out to save money and make the shipment lighter, I would also use an ESD bag. You don’t want static electricity to build up potentially damaging components.