Over the weekend, I changed the M lead to S lead from AC12 to the Front left DSP 8000 and changed the DIN to BNC at the AC12 end using DIN to BNC adapter.
With this connection, I still could not get the C, RF and Rears speakers in sync with the 808.3/861/LF master. Sometimes I need to press source button twice or 3 times before the C,RF and Rears turned on and after that the volume on these speakers will not follow the 808.3/861/LF master. I could somtimes get the volume all at the same level after pushing the volume button up and down many times.

M, thru the dealer, suggested changing the Center as master speaker. With Center set as master and using the same S lead with adapter from AC12 to Front Left (now its a slave) but taking off the S comm from the right DSP8000 back into the S comms socket on the AC12, the system works perfectly, just as described in the ac 12 blues thread.

This is not ideal for me, though, as I like to play direct from 808.3 and Sooloos via ID40 in the 808.3 to the L+R speakers which needs one of the LR speakers set as master using D2 input at the DPS 8000. Any ideas on how to overcome this problem?

808.3, Control 10/twinstore, OPPO BD 83, 621, 861 V6, DSP 8000, DSP 7200HC, DSP 7200