I flattened a typical honesuki profile, so it is easier to sharpen (bevel flat down on the stone), including the tip area. Back is hollow ground - I like it much better than a flat back.
I heat treated this blade the same way I do my other knives in 52100 to 62.5RC, but I might adjust hardness for later knives after I get a feedback on performance.
Knife will go out for testing for performance (geometry, edge toughness when cutting through bones, wear resistance, sharpness, etc). After I get some feedback, I will make another prototype.
My next single-beveled project - yanagi followed by mioroshi deba. All will be done in 52100 steel.