Bahtinov Mask Focus Assessment in NINA and APT

It's back to the William Optics Redcat 51 and that means it's back to manual focus with a Bahtinov mask. In this video, I compare the NINA Bahtinov Analyzer, the APT v3.86-9 Bahtinov Aid, and the good ol' stand-alone classic Bahtinov Grabber software methods of assessing goodness of focus based on diffraction spike analysis. What are the pros and cons? Who wins? Watch and see....