I agree having a large single sink is better for washing almost everything.
Our 990 came with a black plastic cutting board style sink cover but it didn't fit inside the sink enough to keep it from sliding off and onto the floor when hitting a bump or off-roading.
So I got a nice piece of 3/4" blonde bamboo plywood and cut it to fit better and routed out the drop in portion a bit more so now it doesn't slide out.
Also put some velcro pads on the bottom side and now we store the board against the wall next to the stove out of the way when we get to where were going.