be careful with jewels. i can tell you they are far tougher than they appear even @ shy of 2" when newly introduced to an aquarium with a 4" established midas. the midas investigated the jewel and the jewel wanted to have a fight and stood its ground, it wasnt even in the tank 5 minutes. like cons, more balls than brains. tougher than i expected even when presented with a fish that would kill it in seconds if he chose to.
i would get the jewel smaller if you can or grow out the escondido a bit and you may have a little more success.
on that note, best of luck to you.