Well I ran the HPI aluminum threaded shocks yesterday and they lasted all of about 15 minutes. The shock bodies are just too stiff for the soft shafts on any kind of big jump or crash. After swapping out the broken aluminum shocks for plastics I was able to run a little longer each time until eventually I broke 6 of the 8 shocks. I am sure they are great for racing but for bashing they stink.