However, I would stop chopping now, especially in port cities. In 15 turns remaining we will have a great load of catas, and most our cities produce ~13-15 hammers per turn (forge included). So we will have to wait for Samurai - must get money for upgrading swords by setting research to 0%, but this also takes time. And our Galeons would be insufficient to bring all samurai and catas, we should build plenty.
In the long-run equilibrium we need to bring from homeland 6 samurai every 7-8 turns (not including pop-rushers like Madrid, Barca, Cordoba, with them you need more). Thus we need a sigle-file Galeon chain capable of bringing 2 units every 2 turns, and some more for cabotage routes along line of conquest. The shortest way is just 2 Galeon long, but we need more to launch invasion in several places with enough forces. Building/rushing 4 Galeons should be enough.