This is really good. I think increasing the rum to 60 ml would make it even better as the Havana Club 7 is too much in the background, at least for my personal taste.
This is surprisingly phenomenal with Bacardi Ocho. The pairing of that and maple syrup seems to be a complimentary game-changer. I've tried the Ocho with cane syrup and I wasn't a fan. Hmm...