I dunno, I could see it making sense with the flow of the game. Let the player mess around with shit as-is to begin with, start giving them other options when they get to a point where they feel like they've seen it all or when they need the extra power. If you could make a mannequin limb bazooka and a drill motorcycle right away, you wouldn't even bother with the 'normal' weapons.
Just think of them as blueprints if you don't like cards.

