I just got my beocreate board today. Unfortunately your description of the compatibility on the website:
"Connects directly to the Raspberry Pi A+/B+/2B/3B/Zero"
is wrong, since the composite jack on the first raspberry is too high and therefore it is colliding with the toslink output. It is no mechanical connection possible. Furthermore the number of GPIO pins is different. Or have I overlooked something?
EDIT: Sorry, I've overlooked the little plus sign in the description, I did not remember that already the A+ model was without Cinch, my misstake! :)