The UbiBlog offers an Assassin's Creed Syndicate Crafting and Customization FAQ with all you need to know about the topics in the upcoming crafty, stealthy sequel. Here's the intro:

Crafting and customization are back in Assassin’s Creed Syndicate, but how does it all work this time around? What can you craft? What sorts of upgrades will you be able to invest in? How do the skill trees break down? We’ve compiled a quick FAQ to help you get started on your journey in London. This is the first part in our FAQ series to address a wide range of topics, so if you have any questions, please leave them in the comments below and we will do our best to address them in a future FAQ.