Setting miter gage on grizzly G0700 sliding table saw

I am using this saw a lot since getting it. Very nice saw to use and very accurate cuts. One thing is driving me nuts though. The miter gage is very hard to set to a perfect 90 degree or any other setting where it requires accuracy.
When the miter gage is slide on to the table it loose. Since the miter gage does not move, the table does, it then needs to be locked down. When tightening the handle two things are done.
1. The handle locks the gage to the table.
AND
2. The handle locks the position of the gage.
There are no position notches to index the gage so it is very hard to be accurate.

Any suggestion on how this could be done would be very welcome.