I'd contact Primos and ask them what the diameter of the end cups is. I had to get a different bow sling to carry my XT, since my older one was made for smaller cams. Neither of the two at the shop fit well over the large idler wheel, either.
VT, Primos re-designed the sling this year to fix that very problem. Just make sure you get the "new" model/design, as it has bungee type cords that wrap around the cam cup to keep them from sliding out. I have one that works perfect with my Bowtech Tribute.
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