Did you consider just making a steel top-hat with the disc mounting bore/bolt holes on the crown and the sprocket teeth cut on the brim? Seems like it would be less work, and you wouldn't need two sets of bolts.
@gbj_tester started
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Did you consider just making a steel top-hat with the disc mounting bore/bolt holes on the crown and the sprocket teeth cut on the brim? Seems like it would be less work, and you wouldn't need two sets of bolts.