I know, for sure, that the blue nitefinders are better for the yellow ones. There is also blue and silver and blue and yellow nitefinder and just a yellow nite finder. In short, there are 3 nite finders not 2. The silver and blue is best and the yellow is worst. The newer they are, the crappier they get. Normally.
Looks pretty good and it looks like it would work pretty well. I have a question though, would you have to make a certain side hit whatever you're throwing it at?