| Done it three times and yes I messed up one of them by not paying attention to the instructions. The first test I did (5.9) was on the order of 0.5 or 0.6 difference with the lab (6.4 or 6.5) which was just in tolerence. The other good test was like 0.1 difference. So yes it is easy to mess up the test so no matter how many times you have done it follow the instructions exactly. |