Re: The Name is "Nunya" (please don't call me "Nuny")
Just be sure however you mount the tensioner, it cannot move AT ALL!
I much prefer not using one, but sometimes you have chain rub and have no choice.
Lots of good info here on the various pro's and con's of tensioner styles and mounting.. Look it over before you ride and you will be much better off.
(I still think a spring tensioner is a bad idea on any hardtail frame build.)
If more is better, then too much is just enough.
If you can't afford it, build it yourself.