Hi Greg, thanks for the assistance.
I did follow that tutorial from start to finish several times. The three Vive trackers have only appeared once after calibration’s completion; typically I do not see the three trackers during or after calibration.
I sent over the requested files as well as two screenshots (post calibration of steam VR status overlay, and of the final calibration screen). I also took a video of two calibration attempts and some settings screens in Steam VR and on your program ( https://www.youtube.com/watch?v=UU0lSILQQ3U&feature=youtu.be ), however, I didn’t set up the recording view properly so it was zoomed in at the top left of my screen. I can re-do that video sometime if needed.
Let me know if you need anything else!