Fine believe what you want. I just know if you go on any rift lake forum/section it's not recommended. I also know MANY experienced malawis keepers that will say the same thing. I was only saying you were lucky since you are keeping peacocks with some of the most aggressive mbuna out there.
Also OB peacocks are part mbuna so obviously they will work in most cases with mbuna since they are generally meaner. And as I have said at least 10 times that everyone likes to ignore, yellow labs are more mellow and can work well in a peacock tank. I was just stating in general, yet again something everyone chooses to ignore. Since you had some zebra types I was more concerned about that in your tank. Most zebras I experience are too much for even other mbuna so I was worried about the peacocks being stressed out by the zebras.
Congrats on it working for 4 days. I would keep an eye on the zebras as they mature. As a mbuna keeper I know they can be brutal once they mature. Luckily it's a big tank. Also as I asked before what type of fish are your electric blues?
Seriously give it up!!! I have kept them together for years and so has my breeder friends, Just cause you read it doesnt make it true!! I have had 3 mixed tanks over the last 5 years and never had a problem or lost a fish and my fish are all mature....OH and my yellows and Ngara breed regularly in this mixed tank so your theory is bull....