RachelRachel 133k6767 Gold badges315315 silver badges510510 bronze badges 2 three Rachel, that you are a lovely genius!!! And that i am an idiot. Thank you a great deal of for the answer. I had been binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. .. Although https://propertyyamunaexpressway.blogspot.com/