I see that you have a mistrust of BLS and CBO data, but there data confirms my original statement. The y-axis is million of manufactoring jobs. The x-axis is the year. The shaded regions are recessions.
source:http://www.policyalmanac.org/economic/archive/manufacturing_employment.shtml
The paper belows shows that US manufacturing output is increasing while the percentage of employment is decreasing. It states that productivity growth is a significant factor to the decline in manufacturing employment, not outsourcing to China.
http://www.uschina.org/public/documents/2006/09/us-manufacturing.pdf