Timing Chain Tensioner

Ok so I've made up my mind. I've ordered a double roller timing set by Cloyes for my engine. If that also ends up being too loose, I will add a tensioner. I prefer to not need a tensioner, but if the cloyes set is loose I will add one. Can you add a tensioner to a double roller style chain?
It has to be a "tru- Double roller". Not just a "double roller' Big difference and cloyes sells both. If it is not a tru roller send it back. Usually a true roller has more then one key on the crank , They also sell a ("Billet tru-roller") This is a billet true roller in use for over 8 years and still tight.

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