It doesn't sound as if you'll have sensitivity problems Dave! If you do, you can measure contrast either with the lens wide open and/or at a smaller print size. Then go to the desired magnification and aperture and with the meter set to the contrast grade you established previously, meter a shadow. Increase the exposure until the LED moves to the shadow end of the scale, and that's your exposure.
Thanks for your order, I'll get that out as soon as I can.