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> click the buy button and wait and hope for the best.. my advice just do it!

Speaking from experience as a sw guy, the "hit buy and pray" approach should be preceded by as many desk-checks as are humanly possible. For example: Use the design verification features in your CAD program. Print the PCB onto paper, place all the components on it to check for component clearances and orientations (no-one would lay out a connector upside down, would they?)

I think I got that last idea from one of Robert Feranec's DFM tips, lots of good ideas there: https://www.youtube.com/playlist?list=PLXvLToQzgzddPKq_txEXN...

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