The Secret of Tinkers' Construct. - Hexxit Discussion - Technic Forums
Tinkers' Construct Mod (1.18.2, 1.16.5) - Modify All the Things - 9Minecraft.Net
There's a secret 3rd way to add an extra modifier to a Tinkers Construct Tool : r/attackofthebteam
Creative Modifier's don't work on Construct Armor · Issue #39 · illusivesoulworks/constructsarmory · GitHub
Modifiers | Tinkers' Construct 2 Wiki | Fandom
I've seen posts asking about Tinkers Construct 1.16 Traits and Modifiers. Since the guidebook is not yet ready, here is one of the design docs for people to look at for now :
Minecraft Mod Review - Tinkers' Construct - Tools & Weapons - Part 3 - YouTube