Thanks again. I've had other recommendations in the 30khz to 40khz range at 28% duty cycle. I have spoken with the engineer of the inductor and he tells me that its happy anywhere from 1khz to 1mhz. So, I like and appreciate what you say.
While I'm waiting for batteries to charge I've decided to try using an old HP 379349-001 atx power supply to make an adjustable power supply. I have a few potentiometers and LM317T's here to work with. If you're already seeing a problem with this please let me know. I'm going on pizza break now.
Thanks again, John