Vevor hardy hole issue

[Billinthedesert]

I bought one of the Vevor 66-pound London pattern anvils based on favorable reviews of budget anvils. It seems pretty lively using the ball bearing test and is reasonably well finished-- except for the hardy hole. Not only is it out of square but it just barely measures 3/4 inch at the widest. Is the traditional fix just to take the time to file it square, or does one drop down to a 5/8 hardy tool -- or file the foot of a 3/4-inch tool to fit the hole?

 

[Billinthedesert]

John, thanks for the suggestion but I have decided to live with it, so I dressed the edges and mounted on a lumber stand with silicone and chains per John Switzer at Black Bear Forge. It is now virtually silent.