Packing is a big part of not getting your products damaged. Use open cell packing not styrofoam. It is too rigid and does not allow for cushining from impact. Swimming noodles are excellent and cheap to. I will use styrofoam around the outside and noodles next to the gear. Minimum 2" to 3" aroind what you are shipping. Dishwaser / appliance boxes are free, you just have to custom fit them. Costco produce boxes are very rigid for things like amps. I sometimes put 1/8" plywood around it. So far so good with things shipped as far away as NewZealand and Belgium.
