I'd say the guys are right. If you have a dog-legged cable rod then rotate it so there is minimal fletching clearance. The farther out it is rotated the more severe the angle of the cable is leaving the module. Let's make another thing clear here. In 99.9% of cases cam lean and limb twist are the same thing and are caused by the string and cable being pulled to the side by the rod/slide. In some rare cases the cam is crooked due to the axle holes not being drilled straight, but this is rare.
Sometimes you can get a little better results by switching the two limbs around(top to bottom and vise versa), but not often. As Cherryjuise said, pictures can be very useful in these cases.
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