Having called Seagate I was told I could not purchase a circuit board, so if need be I will just use an identical drive (which I have) but would prefer not to, so if I can do this myself how do I get one, I cannot see why I would logically need a hermetic seal, the board is clearly visible, and particulates would potentially be able to both get around it and a select few, through it, so if I do, please explain why.