if i were to have designed the tool I guess i probably would have used finer threads so you could accommodate a higher torque load across the tool... a bit hit and miss too - to insist on using 'cloth' on the inside of the flange when you've got such aggressive threads cut in the bearing surface of the tool itself. I bet it really mangles up the threads or they wouldn't have cut them and THEN suggested using the cloth... just speculating of course - seems reasonable though...