TimberTool is a program that I initially made after a request from one ACA user but that probably others can find useful as well.
More about it at my website: http://www.jtbworld.com/timbertool.htm
Conversion using ExtrudeLinework (notice that the bounding box is not correct).
Result after using TimberTool
Using ExtrudeLinework notice that the Width and Depth is based on the bounding box not the actual mass element.
Notice that after using TimberTool the Width and Depth is correct as expected to be.