I ship a lot of saws and I use the saw box and then something like a Lowes/HD box to double box it. Stihls are famous for cracking around the oil fill cap where that little ear sticks out in front.
I don't remove all dogs/spikes. If they are small, I place a piece of foam in front of them so they can't penetrate the box. Also important to pad the handle so it fits tight and doesn't allow the saw to flop back and forth.
I pad the recoil and handle area as well as the the handle and clutch cover area in the original saw box. In the double/outer box, I add bubble wrap, extra cardboard and plenty of tape.
If you are using a non saw box, I wrap the whole saw several times in bubble wrap before placing it in the box. Foam from old electronics/TV boxes creates good filler material that also adds some shock absorption.
Hope this helps. You can also shrink/pallet wrap the box to create some extra reinforcement and security, especially if you want to preserve and original box for an old saw.
The blue circle in the pic shows where Stihls are prone to damage during shipping.
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I 'm just curious... did you post that to elevate yourself or to support the receiver of that 440 ?