I agree with some of what you say as I and others I know in addition to my RNT DC, Originals and NOS have a DR85 my lanyard. But we/they still blow the DR some of the time. I even blow my Scobey metal reed for a different sound. I also see and have hunted with many that only blow one call that they have perfected and become to use the analogy, the Indian. Those have been, Lares Hybrid, Glen Scobey, DR85, Alvin Taylor, RNT DC, RNT Mondo and Foiles Straight Meat. One of the best Indians has just one call, Glen Scobey on his tarred decoy line laynard. I have seen for years him call in ducks, like a trance. He is a older Reelfoot guide. All about what you have confidence in and your ability to read ducks.