If you bought the Spark amp from positive grid, you probably got an email recently about a Hendrix upgrade they came out with. I was on the fence, and wouldn't have done it if it was much more than 20 bucks. But I got it last night. I had to use my phone app to send myself a link to get on my computer and download an installer so I could download the update, hook the amp up with a USB and update it. It was a bit of a pain. But the upgrade is pretty cool!! It has a wah pedal now! And to me the tone is pretty solid. I've only had a chance to play it briefly, but I'm loving the wah and eager to explore some more presets. Anyone else try it?