I am having trouble with this material. It makes beautiful wings and wing cases but it gets shredded after a couple of fish. I bought it after reading an article in flyfisherman mag. about the web wing caddis. They made it sound quite durable but I have not achieved such results. I have tried varying my cutting techniques from scissors, rotary scissors and exacto knives. None seems to work better than the other. What am I doing wrong or is this what others are experiencing also.