I realize this was addressed once before in a prior post of mine, but it wasn't the sole topic, so it did not get much attention. I placed my order for my TW-6 cam Monday and should get it by Friday. When I originally spoke to Bob Woods he highly reccomended it with the TW-6. I have to say many folks I have talked to suggested not, that it was really just a tuning device and that it was definitely not needed for the TW-6. King of Cubes and others said "run it straight up." So now that I've ordered the cams, and will start installing them as soon as this weekend, I'm having second thoughts on whether or not I should gone with the advanced key? The concept of moving the power band back 400 rpm sounds like a good one, but I don't want to introduce something else that isn't required or even helpful. It certainly isn't a cost issue at $50 with the order of the cam. Thanks for any input!