You'll just end up with lower quality flowerhorns since your reintroducing trimac Gene's into the offspring. It's basically the same as if you were to breed a FH with a veija, it's just going to reintroduce ancestral Gene's into the offspring and basically restart from the building blocks of how Flowerhorns were originally made. Yours will atleast keep the FH/Trimac body shape but you'll have allot more Trimac traits showing in the end.