Very cool fish and thread. I have contemplated getting one and had been researching the idea over the weekend. I think the reason you don't see more of these in the hobby is due to the size they get.
I have a 210 with 2 breeding pairs of vieja fenestratus in it and their juvi's. So at some point ill be selling, rehoming , or giving away a pair. I don't think I could pull off a Florida gar with a fenestratus?
Either way, I'll be watching. I'm happy to see this guy's back slowly going back towards normal.