>> The crank puller thread diameter shouldn't be variable, and the peanut
>> butter wrench wall thickness should not be a problem.
No, it should not be. I have the Campy peanut butter wrench, a similar cheap copy (grape jelly wrench) by ATD, and a thin-walled Sears Craftsman 15mm deep socket. They all work equally and effectively on both my Campy cranksets.
Herb Langston
Evanston, IL