I recently had wes throw on a Limb driver on my pulse while it was there, got it home and got it sighted in and keep having the solid plastic limb attachment move on me every 20 or so shots, I notice I start shooting low and to the left, tighten it back up then everything is fine, rinse and repeat 3 times. I dont know if the cord is to taught causing this to happen, but I am ready to smash it.