My AD-900 is having some problems, and I was just about to send it off for repairs. Right before doing so, I checked my warranty card and discovered that non-moving parts are still under warranty (3 years...pretty nice). So I called Godlyke, and they are replacing my AD-900 with an AD-999. They can't service the AD-900 b/c the chips aren't available. So, here are my question. The guy at Godlyke told me that the AD-999 will be a bit different than the AD-900. He said he thought it was a bit darker, for one thing. Has anyone here compared both pedals? Would you say there are major (or hopefully only minor) differences between them? Second question. I read a review at H-C that suggested adjusting the trim pots in the AD-999 would bring the tone much closer that of the old AD-900 and/or the still older Ibanez analog delay(s). But I'm really clueless about what to adjust--or how. He didn't provide any specifics about how to adjust them. He just said to make sure they were all set the same. Does anyone have any clue what he might have meant? Thanks in advance.