I had one sample of cross contamination of finished mast e 200, brewed in mig, using practices i long since upgraded. But it was nowhere near that much. More like 11mg/ml. i also contaminated a raw sample with my own error using the scoop twice. I have had 3 brews come back OD outside of 10%. I have forgotten items and sent wrong stuff. Not one mistake i have ever made has been hidden or sat on by me. If it was my error, i owned it. And then did what i could to fix it. Been that way almost a year now. Here's to another good 9 months.