redman I have done work for commercial fly tying people and we always use vernier regardless on what die I use we always use vernier it sets the die . We've used many different dies over the years you must use of acetone or something like that to set your die you have to realize that all material that you use as oil and other stuff on fur or feather that you need to breakthrough we do so also wash the material and soapy water it helps a lot I hope this will help out others that want to try to die.