I did consider this for a while but didn't risk it mainly due to the price tag (£20) . That said he's in my community tank and chases away a full grown RTBS and 3 hoplo catifish (also full grown) regularly. He can certainly hold his own. I have some really agressive fish in my Mbuna tank and they pretty much ignore all 3 bottom feeders, I reckon its possible.
You do have a community tank aswell, which means you could try it with a plan B just in case. If you do go for it, I think a full grown or near full grown GNP would be essential.