I know I posted this ages ago, but I still don't understand exactly what this thing does-

http://www.savagearchery.com/store.p...cee32b19ef74cf

Savage Turbow dealie-ma-bob... At first, I assumed it simply restricted cable slide movement to increase draw weight, but from reading their description of it, I'm left wondering what the...

Anyone every seen or used one? What's it do exactly? Does it have any merit?