Hey Eric,

I'm going to make the entire tool and use the standard PT 43.95mm Reamer/Facer combo. I'm limited in acme thread size by the center ID of the reamer and spacer combo shown here Park Tool Co. » 788 : 43.95mm Reamer : Frame & Fork Tools. That's good to know that the park reamer is easily bent, do you happen to know what the stock Park Tools acme thread major diameter is?