A friend of mine did a few. It's tungsten balanced, so filter accordingly. The rated it around ASA 3, I think. You can do a speed test with small 1x1 inch clippings to save paper costs, or use a piece of thin, opaque cardboard to make 3 darkslides. Cut a hole in each: one at the bottom right, one in the center right, and one at top right. Then expose six different areas of one sheet of paper by changing which darkslide is in place (reverse the darkslides for the left side). Give each area a different meter reading, then develop the whole sheet. Choose the ASA you like best with minimal cost.