Thanks Joe, definitely leaning towards steel with your comments in mind. Your off in T9 at Willow could have been a lot worse with a complete break instead of a bend...
Charlie, if I'm picturing it correctly the control arm broke on the outside edge of where the drop link goes. I'll try to take a picture tomorrow morning but I haven't had the time or desire to go look at it
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Steel arms are cheap everywhere (< $25) while aluminium arms are around $500. I can get steel arms with all new bushings and spares for the cost of a single aluminium arm.
Is there a writeup on what it takes to make the conversion from aluminium to steel? Maybe a parts list?