Cutting foam in a pelican case

Use an electric meat cutting knife. The kind that has 2 blades. Works great ! Don’t cut you fingers off !
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First one I did with electric knife:
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I started with a HotRod type device. Gave it up. Got out my pocket knife, a Benchmade, and cut it up. Wouldn't bother with all that electrical crap again.
 
I’ve used a hot knife in a few and had excellent results. Can be had pretty reasonable from amazon. Just do it in a well ventilated area as it puts off some fumes
 
I've done a few with the my electric fillet knife, it works well...but I find holding the knife perfectly perpendicular to the surface the biggest challenge. And when you try to clean up a spot where the knife wasn't level, it looks like hell. Before I cut the foam on my new cases, I think I'll try to rig up a hot wire type cutter, watched a few videos on YouTube on how to make them...seems pretty simple and gives a perfect cut.