Heya, I have been on a look out for photos of OB-4 Internals. Finally there seems to be some online from an FCC site Although they are not close enough for most things you can still find out a few of the ICs that are used. 
. https://fccid.io/document.php?id=4799034
These photos where the ‘leak’ before it was announced during the tease weeks
Aha! Gotcha. Thanks. I have been looking for better close ups of the circuit boards, but don’t want to take my unit apart. :S Well I hope we get higher res photos soon. 