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Ok, you win.
I'm sure if I had your stones , a pencil and my Shapton plate, I could prove you wrong..
:)
Still, a new stone, lapping would be my first port of call..
Thanks..

I hear you.
However I raise slurries around the sides always and still find dishing to occur.

I guess it comes down to , how flat do you want your stones.

Maybe it is dished ever so slightly...

If the stone has been honed on then it would not be flat..

:)

You have loads of choices.

Firstly I'd lap it then remove the lapping marks with a Tomo.
I have spent most of today lapping my Nakayama . I made the mistake of using sandpaper which impaired the...

Personally I would lap the top and maybe tidy up the sides and bottom a bit, if needed Take any sharp edges off etc .
Sand paper can be used..
Mask off the top and a bit down the sides.Then spray...