Not much more to add than that other than "Does anyone have a TutorVision?"
How rare is the Tutorvision? Maybe its not as rare as you think.
Here is possibly a photo of the Tutorvision mainboard.
This photo came from here. http://forum.arcadecontrols.com/index.php?topic=144540.0
And more info on that board here. https://console5.com/techwiki/index.php?title=INTV_System_3
It looks just like this photo of a Tutorvision here. http://old-computers.com/MUSEUM/photos.asp?t=1&c=1214&st=2
Its marked 1988 INTV but Its missing the combined STIC/ram/sound ch