Its an easy forgotten technique not to bring the control arm (wishbones upper and lower) pivot bushes to torque untill the car is sitting level on the ground. Run the nuts up, finger tight is ok, (ball joints and spring unit safely re-assembled of course) and then let the car settle before tightening the bolts against the bushes. You dont want to tighten it when the suspension is fully dropped (hanging). Doing so clamps all four of your control arm bushes at that extended point, which is not where they want to sit once the car is on the ground. They then twist immediately, and will tear at some point, sometimes even as you put the car on the ground.
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