Used horn has a mouthpiece that is very solidly stuck. May have been stuck for years from the look and feel of it. I’ve tried to twist and/or pull it until I’m afraid of causing damage to the neck from the amount of force I’m exerting, and it hasn’t budged. Mouthpiece is nothing special but I’d prefer not to take a hacksaw to it on general principles and especially to avoid the risk of slipping and damaging the neck or the Microtuner. Any suggestions or tricks I might try?