I bet this will be a very fast bow! Which woods is it? didn't get this.
I believe HLD works like decrowning - spreading the forces more even over the limb width.
I also believe it works better on high crowned backs where chiseling it out becomes even tougher. Also the flattening is more recognizable, which depends a lot to the crossection. I think to remember it should look like a half-moon...
This are just my little experiences. Simson have a very good topic about HLD on his website, gonna read it before making another. The last (a backed maple ) blew on the tree...and its a lot of work!
Congrats Parnell
B2W