I have been using ramin rods from TOW and have had no problems. I stain mine with walnut hull mixed in Watco Danish oil finish.
Soaking rods in kerosene changes the fibers in wood, making them more flexable. If you want to do this, take PVC, capped at one end, place the rod(s) inside and fill with kerosene. Let soak for about a week.
Like caphee said, if you start out with a sub standard peice of wood, it still can break.