While you two are going back and forth I thought I would mention I don't think many people would recommend the AlphaPix. I own one and I don't think I would ever recommend it.
I've never quite understood this. I've been completely satisfied w my Alphapix-16. Not
sure what I'm mising, because it did everything I needed and expected.
Moving forward though, I really liked the Pi Hats I ran as well. I think
I would prefer sticking with those in the future, given then price-points vs any controller.