@BATTLEAXE called it. It's gotta be flush on the bottom, so the top sticks up and the skewers on the fuse can go through the holes. Don't worry, it's a pretty easy mistake to make. Did that one, myself.
If you're having trouble melting the glue, just use a sharp, thin blade and cut between the firewall and powerpod. It's pretty simple just to build another powerpod, but if you're careful, you won't have to. Once again, been there, done that.
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