If you have a suit of full plate armor, can you improvise or remove some of the armored leg portions to functionally approximate half-plate?
Plate consists of shaped, interlocking metal plates to cover the entire body. A suit of plate includes gauntlets, heavy leather boots, a visored helmet, and thick layers of padding underneath the armor. Buckles and straps distribute the weight over the body.
Half plate consists of shaped metal plates that cover most of the wearer’s body. It does not include leg protection beyond simple greaves that are attached with leather straps.
Now it seems to me that the top half of the armor (from this description, at least) is virtually identical. I suppose most of the question hinges on whether you can fashion greaves (or something functionally similar) to pass for their purpose from a suit of full plate (preferably without any appreciable penalties to AC).