That gets to be tricky, your soundboards are the vocals in your call, Each type of soundboard creates a different sound out of each call, whether you use glass, slate, wood, copper, alum, brass, acrylic, horn, they all have a sound of their own. As does the wood pots, the secret is to find what mixes work together in your pots. What works in mine may not work in yours. A plastic pot is easy, they all sound the same, so when you find a sound you like then stick with it. There is no short cuts in finding what you want to hear unless you've tried it.