I was just SURE the “wheel” referred to O’s!! In one progression, you kept adding an O to the mix of letters until you had 4… like tOe, OtOe, OtOOle… so was I supposed to come up with a word that added to all these letters without scrambling them, and including at least one more O/wheel? Hmm… now that’s a challenge for a bunch of muggles… anyone? Well of course that’s not the meta, because it would need to be way more than 7 letters… so how about that odd clue “go ON and ON, often in mONotONe”? FOUR on’s? Now that is suspicious. There are a ton of ONs in the grid… why? Also there are a lot of ONEs… and several clues contain “one,” “one’s,” “once.” And the on/one entries in the grid are almost always in a cluster with T’s. Is there a configuration that is repeated 7 times, and in each there’s a fourth letter hanging out in the same position in the configuration? Sent all this to Wendy, showing her the math, and she kindly told me to stop thinking so hard… just look for 3’s that get a fourth, and always in the same position. (Which is kind of what I was doing, but way too fancy.) Fun challenge, and I got several good meta ideas along the way!