I can't twist it, I'll post a photo of how it looks like.
**broken link removed**
What is "anti-seize"? The tip was allready in place I did not had to put in. Tips cost 6$ where I live. That is very expensive for a piece of copper or brass. And if you try to de- solder anything you will damage the tip.
I'm looking forward to buy 3.5mm copper wire instead and got it electroplated by nickel and iron. That should be 5x cheaper than to buy the tips from weller. If I'll be sucessfull in outsourcing parts and services.