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If it was caused by the warp, a rolling X stroke should have got the heel honed.

Honing to the edge is just that, adjusting the X stroke, so the pressure point transfers from the heel to the toe...

Looks good, the warp looks slight and the edge ok. Just make sure you are honing to the edge.

Yea, did you remove the stabilizer completely?

When you round a heel, I like to leave a little more...