Thanks for the progress report, Rong. Have you verified that the belt groove in the repaired crankshaft-pulley runs true?
I'll look forward to your pictures, which will enhance the usefulness of this archive to other HD8 owners. As you know, Rodeobob is particularly anxious to see enough details of each component of the crankshaft pulley clutch to enable him to make or commission the manufacture of the parts missing from his HD8s. However over the longer term there will be HD8 owners looking for documentation on various parts of the mower, and any dimensions, pics and sketches you can provide of any part of the mower, will be of great help.