And here is [url=https://bookandsword.com/armour-in-texts/rules-of-the-venetian-guilds/#title_crossbow]a handy page with just the English translation and the Latin original[/url], no back-and-forth. If your idea of medieval craft workers is Fulliautomatix banging out horseshoes by himself, this is a good picture of how communities of workers regulated quality.
If you don’t have a good picture of medieval European crossbows in your head, [url=https://archive.org/details/Book_of_the_Crossbow_The_by_Sir_Ralph_Payne-Galloway/page/n149/mode/2up]Ralph Payne-Gallwey[/url] has some diagrams of the parts (although other parts of the book are not so trustworthy, he was one of those Victorian hobbyists who made stuff up to fill in the gaps of his research).