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Is the tape wearing out in just one spot on the spine????

Plastic electrical tape is what you need....
It will not hurt to add tape, the 3M brand is the most consistent I have found but any will work....

Wedges are a bear to hone, one question??? did you tape the spine????
You can discuss this till the cows come home, but setting a bevel on a W&B wedge on a 4k is going to take TIME and a ton of...