i had a really nice reply all wrote out and lost it because of my g-damned internet....
i am not going to even try to repeat it...but i will just say my radius blocks from stewmac suck,and ebony is very difficult to radius by hand.
don't accept imperfection in your tools,or your work can never be top quality...i get much better results by ordering preradiused and cleaning it up from there by hand...
imo the only blocks good enough are the aluminum ones,and they cost too much.
if i accept a less than perfect radius block,then my radius won't be right,my fret job won't be right,and my guitar will play like an ltd model....ltd models are cheaper to buy than to build...so there you go
i assure you my lost post was much more eloquent