I have honed the bore with the spring set on the hone at its lightest setting.
I honed it only until I couldn't feel the rust marks anymore, it is all smooth now.
I tried for a 30 degree cross hatch.
My hone with balls on it wouldn't fit, it was too large.
I have remeasured the bore with my internal calipers and transferring the measurement to verniers, best I can measure is 64mm.

[Linked Image]


Happy is he who penetrates the mystery of things.