Strobengh,
Your tang will tend to be the same thickness as the blade itself. HI does not thin the tangs out to speak of.
Willieboy,
Just to help clarify, even the tang on a regular khuk typicaly goes all the way through the butcap and is peened there. (There are some exceptions). The Chirawa type of handle is basically like a more western style handle with handle slabs bonded and pined in place as on a CAK. Both styles are very strong. Some feel that the chirawa style transmits more shock to the hand and that the standard tang does not. I have not noticed it myself, but some do. As to the convex edge, some have it and some don't, most prefer convex though and more are coming that way these days. Have fun!:thumbup: