Teddy,
that's a truly gorgeous heckel setup now, you should feel proud of yourself.
I wouldn't do any more changes at the moment because they really need to settle in now.
Okay, IMO I would add the cleanup crew soon, it will make the heckels more curious about their environnement and they will come out more (yes they are very curiuos fish when they get adapted).
P.S. Put the outflow from your filter closer to the surface, there is a slight film forming and you want to break the film in order to have a proper oxygen exchange at the surface of the water.