This looks awesome but I think I’m paralyzed by all of the possibilities. My Kinesis Advantage 2 has served me well for years. I wonder if anyone has switched from one to a custom board?
I switched from a Kinesis Advantage 2 to a Glove80 over 1.5 years ago (not custom, I know) and I love it.
I also made some Dactyl Manuforms, but their key wells are not as nice as the Advantage, let alone the Glove80. They also have pretty bad thumb clusters (though with Cosmos it's configurable), not a good palm rest, etc. The only custom board I would be interested in (if the Glove didn't happen) would be:
If the Kinesis is working for you, I would not switch. It's an extremely high quality board and most of these Dactyl's are all attempts to replicate the Kinesis at a more accessible price point and/or with higher amounts of customizability. The tradeoff is that they tend to be extremely fragile, have really poor build quality, and have zero to none customer support attached.
However, the KA doesn't work for everybody. I find it too big and the switches too heavy. So I opted for a custom approach, which sadly only survived about 4 months.