AutoCAD Inventor :: Using Model Dimensions To Fill LENGTH / WIDTH Fields In Drawing Parts List

In our “Parts list” (or BOM as we call it) on our .idw’s we have field for “LENGTH”. For example, we use round tubing. We would list the cut length of that piece of tube in the “LENGTH” column. As it stands now, we add “LENGTH” as a custom iproperty in the .ipt. Then in the drawing we add that property to the parts list to capture the length. This works fine, but I’m wondering if we can eliminate some steps by capturing the actual dimension from the sketch to automatically populate the “LENGTH” value. Needless to say, this would eliminate room for error (less typing) and will update the value automatically if length is changed or if the part is copied. I suppose the same would apply for “WIDTH” on sheet metal parts... How do I do this?