I've been looking at programmers and so far this one stands out. It has the most detailed information as to how it works on the website. I've looked at several and have seen tuners that claim they are the best and don't tell you exactly what they do. I don't know exactly yet how pricing figures in, but this one satisfied my curiosity. I'm going to bring it up at Jim Dean's Off Road here in Western New York. He's the area's go-to guy for performance and modified trucks. I'll see what he says about this mod and post his reaction to it. I have to get my truck first, though. Waiting on a 2021 factory order. Thank you to Midnight for directing me to a catch can mod on a website that drew my attention to this tuner.