LM6172 was the best I could come up with at the time. I had tried some other methods, lm339 (not particularly highspeed , but dedicated comp) and some other ways, transistor things etc. I tried LM6172 and it worked for the frequencies I was clocking so I just stuck with it. I’m a hacker mostly, not so much an engineer. I really started getting in to electronics when I started doing lunetta CMOS synths, which is a very hacky audio synth DIY thing, which I still adore. Anyway, it ends up giving the castles an interesting look I think.
In Fortress we used dedicated comparators, and they are really sharp, but I still like how the castles look. It’s a different tone palette.