I've been researching them the last several days.
I've read some people say they'll eat small snails but not big snails- and I've seen others say they've had Kuhlis with snails and the Kuhlis never touched a single one... I suppose it might vary on the individual fish.
Never had the experience of owning Kuhlis- this will be a first for me. I'm also not sure when people say they eat "small snails" if that means newly hatched snails- or just any smaller than their mouth.
Either way- not too concerned- the MTS, were I to get them, would be in the tank and breeding before the Kuhlis and I doubt they'd find them all. Any ornamentals would be too big for them (I suspect).
There about 3 species ahead of the Kuhlis on my checklist that I'm going to add before the Kuhlis... Snails would have AT LEAST a month head start to become baby machines.