Thanks for this. Sorry I have been away. I am not sure if you got all the measurements needed unless I am miss reading something.
There should be two angles from each X and Z axis of the inspire. Were these both 53 degrees? Also I think a wide tolerance will be needed for this since we're are sort of guessing at this point. Maybe +- 5 degrees or even 10 to account for anything we can't see without a log file. That would give you more of an area than a pinpoint location which could be better at the moment. Also do you know how to retrieve a log file from the inspire? I don't but if you can find your imu angle at the time of the shot, that can counter and give you the correct angles and get a better projection of the shot.