See this hate-free thread on the Ultrafire WF-501B & flashing drop-in
Originally Posted by
SlimAgainSoon
I think buried in this thread you will find a discussion about a red P7.I tried, but I couldn't wade through all the hate. I had to bail out of that thread.
See the thread
Ultrafire WF-501 B works with flashing mode Cree XLamp dropin: Closups & beams. Hate-free, photographs and now even a link to a YouTube video.