I've got a bamboo yumi from Yumi-Bows (their web site is down at the moment). I've had it for a couple of years, but only just started using it again regularly. However it is warping. I think it is from the humidity, because I'm using it at an outdoor range in eastern Pennsylvania in the summer. Given that I'm planning on practicing a lot, I thought I should get a yumi made from either fiberglass or carbon fiber.
Can anybody give me a rundown on the differences between yumi made from fiberglass and from carbon fiber? As to how they would affect my use.