Talking about home-made tools. English is not my native tongue. That makes it sometimes hard to express what I want to say. But there is an expression: a picture can tell a thousand words. I would like to point to an entry of djozz in the thread “What did you mod today?”. It is a tool to remove the bezel from a Thrunite headlight. He made it from an Element-System bracket (just to name any brand, there are dozens of companies making these). The two protruding parts fit the slots in the retaining ring. Here is the link: djozz tool.