I like the .37 much better than the .51 for what these are meant to do — gimme some vintage. I also like the way the .37 has less of a low-end bump. If you really want to simply your workflow, try doing a mix using only these for your EQ. You will get a taste of how good the recording engineers were “back then.” You can find my presets for this here.
If you use this on each channel, slightly vary the amount of drive and analog on each instance. Tiny changes will model the small variances of a real board. Be aware though, there were only 4, 6, or 8 channels!
My PC-Channel preset. I have more movement (if you want to call it that) in the stereo field, and more analog noise including some hiss. It doesn’t go overboard on the noise, so you can use this on every channel for a vintage vibe. And like I said, I really like the .37 way better for that. You can get my presets here.