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The 12k will almost certainly need to be lapped. The DMTs are guaranteed flat and lapping them isn't possible. The D8C is an excellent tool for the job.

Lapping hones isn't really hard to do. Use...

IMO, yes. More diamonds per square inch. You might need to rinse a bit more often than w the polka-dot models.

I use and recommend a DMT D8C 3" x 8" continuous plate for lapping. It's a 325 mesh.

Several members have used it to lap the Chinese 12k. It is far superior to the mini when lapping (24 sq." vs. 2...