I almost went against Roger's advice at Black Widow, when picking wood combinations for my PLX last year. I'm glad I didn't, in the end.
I had already found some sharp veneers at the Waterloo, IA show, and needed to match the riser wood. I asked BW to send me some pictures of previous PLXs they had made, with similar veneer coloring to what I had found, and they gave me a good idea of what different combos would look like. Then I figured on a certain riser wood, and I could hear the hesitancy in Roger's voice as I explained my choice to him. He suggested something else, and I started thinking, "He knows something I don't." I decided to trust him and his experience with hundreds of other bows, and it paid off for me. I now have the most beautiful PLX I've ever seen, in my professional, unbiased opinion!