Black magic is running an internet special on them right now, ends today or tomorrow I think. They want $40/pr. You can get black, purple or silver. I thought about ordering them for looks and reliability, but $40 can be better spent if the plastic ones are still good. Black Magic Racing
Find a way to lift the back of the sled about 12-18 off the ground. Remove the bogie wheel next to the long leg of the spring. take off the piece that holds the spring to the suspension rail. When the tension releases on the spring, the long arm will hang straight down. (this is why the sled needs to be in the air) the hole spring will be loose and the blocks will slide right off.
I found the easiest way to replace them is to roll the sled on it's side, just as if you were checking your carbides. AC's are balanced to do this, you can even roll them over by just lifting a ski handle.
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