So I ordered another Buzz pro a couple weeks ago. I don't care for the delrin threaded caps, so I ordered an all metal cap to be used instead. Once again, I was sent another end cap that doesn't fit the device. This is the same thing that happened the first time I ordered one for my other Buzz. That one I sent back and got a replacement that works. I can understand a bad one slipping through every now and then, but right now I am 2 for 2. This time, I'm just going to return it and be done with it. Frustrating to say the least. /rant