I never really thought much about it as I do not have a PSP.
I think if I needed space to add something like a small light, the foil would probably stay and the fishing kit and scalpel blade would go.
Yeah, you're right. The funny thing is I've not removed the fishing gear from mine!

Mostly unnecessary for fishing but I figured the pins might be handy. I should pour thru the fishing kit carefully see if I should ditch it altogether.