hey thanks for the comments!
I definitely see some micro fractures in the buffalo horn. I'll keep an eye on them to make sure they don't get worse. Not sure how I would fix them if they did...
The yellow heart had a nice price on it a local shop that carries exotic woods. The rough piece didn't look like much in the store but it sands to a nice color and buffing it brings out a lot of its natural richness. With it, I got some rosewood, cocobolo and jobillo. I was thinking of re-handling my artifex suji with one of them. That would be my first western re-handle. Frankly, I was expecting a few trials and error before having a handle that suited. The first one worked so now I'm left with more wood than i expected. There's even enough yellow h for another.
"Sorry hun...guess i'll have to buy more knives. Wouldn't want all that wood to go to waste"