Lemmee try to make some sense here...the 2 reasons not to use a tensioner are:

-for 30 yrs they did not use one

-some one had trouble because one was improperly installed


The tensioner works, I torture tested a few running many laps on the road course, No failures, no issues. I have a log book, but you can't see it. It's a lot of laps which could translate to thousands of 1/4 mile passes. Hows that for data?

Some history
the tensioner was designed for the V6 to hold the timing steady at idle and thru the rpm range.
the roundy rounders discovered it and began running it in their engines with great success.

You can't just throw one on the engine with any chain and expect it to work. As in any engine build the parts need to be fitted together for proper fit.