I have 2 identical drives, both 2TB models. One boots normally, and the other took twice as long to boot. I had to pull the drive out and run a diagnostic test to identify the issue. The new drive after RMA replacement works great.
I used the Bare Conductive Paint for my last TSOP. The consistency is great and can be applied easily without making a huge mess. If you mess up you can remove the paint easily with alcohol.