Budman,
Hate to burst your bubble but you'll rarely see the calvus/compressicep with all that rockwork. They will just hide most of the time.
Also, I think its too much rockwork for frontosas. They are very skiddish fish and when they take off they will hit everything in their way. I've seen frontosas lose eyeballs hitting rocks.
These fronts I can almost pet at feeding time. They are nuts and come to the top and try to bite my hand lol. I am getting some wild calvus most likely though. If they breed they breed. If they don't they don't. Not looking to make cash off them, I just love the looks of them.