The 3-4 bows I have had to fail over the last 20 years or so, have all broke at the fade-outs; the same area where many strap-on quivers attach. On 2 of the bows, I never used a bow quiver. Although just my opinion, I would think the pressure a strap-on quiver exerts on a bow would not be great enough to cause failure. On the other had, if the area under the straps retained moisture for prolonged periods, I could see it possibly effecting the bow's structural strength. I still use a strap-on quiver, but do occasionaly take it off to clean my bow.