Nice pick up garfy, Cubans are another cichlids I'd love to own day.
As far as being bit, pssh... Almost everything I have kept the last 5-7 years has bit me. Dovii(young) RD, Oscar, trimac, cons(prolly more then all the others combined). Even my giant danios I had would nip/bite whatever you wanna call it. Soon as I'd put my arm in the tank they would bite my hand and arm as I'd gravel vac.
The dovii were the only fish I was scared of she bit me after their first spawn, was around 6-7" and let me tell you still put a hurt on me. At 12-15" I made sure a divider was up and both on one side regardless of a spawn or not.
My Tmac/RD could dish out some good bites as well, all though the RD would get me 90% of the time I went into the tank.