Not a lot of luck following the tutorial.  By page 36, I have had to begin several times because of eratic behavior of the program. I added a helper axis and began to pan.  The control of the pan was very difficult.  As I tried to orient the pan control I noticed that the origin as well as the helper axis began to drift around the room.  The program behavior became so erratic that I could only guess that I wasn't starting from scratch when I started a new attempt.  I have worked up to page 32 several times now, and it seems that the problems are starting to get worse.
 
I am wondering if because I am doing a "save as" hoping to overwrite my past work.  Maybe I don't get a clean overwrite of the file when I use the "save as" command.  I think I will try saving under a different name and see what happends.

Hello John,
 
  Erratic behavior (in pan and orbit) can come from :
1) a bad calibration
2) the choice of the Up axis (calibration) is different of the Up axis in the preferrences.
 
If 1) could you post an screenshot were I could see all the calibration features ?
 
If 2), there are 2 solutions:
- choose by default Y as the calibration up-axis (same as the default Up axis in the prefs)
- change in the prefs the up axis that correspond to your choice for calibration
 
Hope it helps,
 
Stef

I can understand the poor calibration issue.  I wasn't able to get a score higher than 36%.  Than was one of the reasons I had to start over so many times.  I'll try again today.

John,
 
It's well worth following the video tutorial on calibration. If you follow the recorded sequence, you'll soon see how to calibrate and get above 95% accuracy.
 
AB

I'll review the video and see how the calibration differs from what I've read.  Try, try again.