Thanks for replying.
I need Edge-like mod speeds, which can get up to 5Hz-6Hz in some cases. Right now the vintage delay algo can't get me close, but I can usually nail it with the digital delay algo. But I have to max out the mod speed in a lot of cases. So, my .02 is to increase the vintage delay's mod speed a fair amount–at least double it. The digital delay mod speed (for my needs is pretty close), but it would be great to have a bit more there, too. I'd say 20Hz is definitely not needed–for me anyway.