Geek, Jantz has it on their site. It can also be found on eBay.
I'm betting that his cracking is more from using an end-grain piece than one too green.
Osage is finicky...dense as hell, hard to sand on a grinder without burning it...and if it does burn it can run deep quickly making it impossible to sand it out. Also, if you make the CA and dust slurry...it will not be the same color as the wood, it will be darker. Osage dust starts to oxidize fairly quickly (turning brown) and makes filling and blending with the dust fairly difficult.