July, 2011. Anne Loucks begins testing her second prototype MRTA medical device P2, which is designed to test the forearms of people in a supine position. The Ohio University Biomedical Institutional Review Board accepts that prototype P2 is also a non-significant risk device. Improvements for avoiding sources of error in MRTA begin to emerge. Measurement repeatability is greatly improved, but accuracy is recognized as questionable, because measurements vary greatly with probe position, and have multiple values even at any one position.