The main board or the slave in the DMD? The slave board is the same 1.0 (1.1?) type I've only ever seen in these cabs (I bought one and I know the guy who purchased 3 more from the same site, so I've had lengthy discussions and feedback on what's in his vs mine)
The main I/O board is a 3.00 which I believe was the final revision of these boards, it's certainly the latest revision I've been able to find any record of.
I have certainly considered this may be the same board found in the CL2 cabs as it has multiple headers on it I've often thought may be associated with the memory card readers, which is why I was hoping this cab had it's I/O board in place to confirm that possibility