Hey DonQ,
Frank and I had a thread going on this.
See 3/4” - 5/8” hole table - #2 by whiteout
The reducers from Amazon work as is, and are the quickest solution.
The spacers from spacers online were too tight a fit to drop into the 3/4" holes, but with light sanding using a fine abrasive belt I was able to get the fit I wanted.
Cheers,
DonS