Norton 4K/8K first lapping
I just did the first lapping on my new Norton 4K/8K. It wasn't even close to being flat. I had to lap 1/16" to 3/32" of material off before I got it perfectly flat on the 4K side. Same on the 8K side. It took hours to lap this thing and I didn't even finish the 8K side. I still have two opposing corners that are still rough but I got tired of lapping it. Enough to hone my razor though as long as I stayed away from those corners. I used a DMT Duo Sharp with the coarse side rated at 325. The one that's perforated with the plastic in the middle. Also tried 325 wet/dry sandpaper on granite.
Is this normal for a first lapping? Should I get a different lapping hone? Does anyone use the Norton lapping stone? To me it seems they could have gotten it a lot closer to flat than that. The stone actually rocked back and forth on the diamond plate!
Anyway, I honed my razor using pyramid method and then a few laps on CrOx on felt paddle and shaved with it. Got a good shave from it. I was impressed by the polish the 8K left on it. It leaves more of a mirror finish than the PHIG I got from Woodcraft. The PHIG leaves more of a satin finish.
Should I get the Naniwa 12K? Will I notice a difference in smoothness of shave?