The new black PCBs arrived this morning! Unfortunately my day job is going to keep me super busy this week, so it might not be until Friday evening before I get a chance to assemble some. I went with black soldermask in the hopes that the dark background will make the orange LEDs stand out more, and make the decade counter IC in the middle blend in more with the background. I like to order my prototypes from pcbway.com which offers 10 pcbs (100mm x 100mm or less) for $5. They also offer a range of soldermask colors at no extra charge. These will be hand assembled, so I went with HASL instead of ENIG. If I had planned to assemble these on the Pick-n-Place machine, ENIG is preferred.