Hey there, check the MS8 for delay settings. I think there's delay that can be added. If nothing else, you could employ a delay relay.
As per my PM back to you, I used that remote trigger wire (purple with red stripe if my memory serves), coming from the Sony sub amp...and it worked well.
Stand by, I'm going to DL the MS8 service manual and see if I can find the spot where delay is spoken of.