Yeah, I'm a huge fan of the BJEF Blueberry - and the version you built me has become my go-to overdrive. The Blueberry (and I assume Honey Bee) just has a sound to it, a grunt that I dig. I've also found that I like turning the drive off on the Blueberry side but ramping up the volume to push the Submarine side into a more transparent breakup. Neat.
I can see why you didn't dig the B3K. It colors your sound as much as any OD and in a modern, scooped way. Pretty far from your vintage tone. It's great for a guy with rounds playing modern hard rock or metal but not so much for gritty, tube-like warmth.
I'm a bit surprised you didn't dig the Vintage Microtubes. I wish it had more gain on tap but it strikes me as warm and natural.
But neither of them hits the spot for me like the Foundry so I think I'll put both Darkglass pedals up for sale.
Just goes to show how personal tastes are for things like overdrive, fuzz and envelope filters. I think the Darkglass stuff is fantastic, just not for my sound.