Excellent work. Just a nitpick based on the board photos, it is hard to tell from a photo, but it might be worth bumping the default anualar ring size up a couple of notches. Particularly on the connectors, but also generally it looks very much tighter then I would normally use for a through hole board, and increasing it will make registration of the two layers somewhat less critical as well as making removal of a component less likely to damage the board. Also, adding stitching vias will help tie the two polygon pours forming the ground plane together, never a bad thing. It looks to my eyes like C11 is across L1, I would have expected to to be to ground? It looks on the photo like there may be something funky going on under R20 component side, dead track? Via tenting? Your call, but normally our house style tents both sides of vias. Teardropping connections? if you cad package does this it is useful on a through hole board, the extra copper makes accidentally pulling a pad during rework slightly less common. Sorry, doing PCBs professionally these days and you come to notice these things. Regards, Dan.