Awesome Trimac. I am growing out 3 different pairs. My largest pair the male is about 6" and the female is a tiny 3.5-4". But I know exactly what you mean, great personality and always the first to greet me. I would have to say that all of my Amphs are that way. Both my Hoga pairs, my Isletas pair, Xilo, Devils, and Trimac all come to the top of the tank and eat out of my hand. The Isletas and the Xilo let my pet the nuchal humps. LOL
As for the Chancho. You have to keep him. Mel, (up here in wash, otherwise known as ginormous Dovii mel) has several, his large male is easy 16". Awesome looking fish.
They all look great, keep it up.