[Elecraft] How much room when packing a K3S and P3 in a box

[ae4pb at carolinaheli.com]

Hi, 
I'm packing my K3s and P3 in a Pelican 1550 case. This is just to protect
the rig while it's in storage until we can get into our new house. 
How much foam packing around the rig is sufficient? I'd like to put the rig
and P3 next to each other only separated by the rubber feet on the K3. 
If I do this I believe I can get about an inch on the sides and  maybe 2 or
more inches front/back/top/bottom. 
Thoughts?
Thanks in advance.
De AE4PB
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