I know many, if not most, ream out the post hole on the Grizzly banjo to 1" so it will accept most other tool supports.
Some have reported using a 1" drill or core drill, others a reamer, still others simply opening it up with some kind of abrasive.
Do you continue to use the Grizzly supports as is or do you aquire a .020 sleeve of some sort?
If you use a sleeve do you make it with brass or do know where I can buy one?