Cuban Spanish help

[littlestclouds]

I've done a fair bit of research on Cuban Spanish/local slang/colloquial sayings/etc. and I'm trying to find a phrase that has the same or similar meaning as "Better safe than sorry." Right now, I'm going with "Más vale prevenir que lamentar, acere," but I don't know if that's accurate or if there's a better way of phrasing it. The character being spoken to is a Havana native while the character doing the speaking is American-born but of Cuban descent, and not that fluent in Spanish, if that makes sense.

Also is there a colloquial way of saying something like "claro que si"?

Thanks!

I'll probably be crossposting this in little_details too.