Chagrin:
If you're worried about signal degradation then the solution would be a (non-inverting) Schmitt trigger buffer.
Exactly! That's what I'm looking for. I guess I got the wrong one and it was inverting. I assume I could still use it but I would have to use twice the channels to uninvert it. The buffering caps are there, I just didn't draw them. It's powered by a 40a 5v led supply. I will be putting at least 4500uF of buffering capacitors all over this thing. I've already got one controller working with 16 multiplexed leds no problem. That signal degradation was my only limit to expanding.