Ok, John shamed me into tweaking the layout. Here's the latest revs. I did address the lines crossing the hole keepouts, as well as rationalizing out a whole bunch of vias. My criteria for a clean design includes as few as possible jogs in the traces, minimal number of vias within reason, and an adherence to x on one layer and y on the other.... until the routing is done, then around the margins, it becomes OK to violate that rule. Symmetrical layouts of repeated circuitry. Also only 45 degree bends, (90 or 45 at vias OK) clean pad entry, (no acid traps), trace widths no narrower than the design justifies... very conservative rules. Makes for high yields and reliable boards. Anyway, now I'm pretty happy with both of these boards, and after some careful design validation, I'll be ready to order boards. So your feedback, please. Thanks, Terry
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