XRAY - Model racing cars

Hello,does anybody knows the real differences between aluminum and plastic schockabsorber's body?
why the ufficial team has never used aluminium ones?
thanks a lot

well alumiunm ones tend to leak uless you take extra care building them, the only difference besides strength, is the adjusteable collars seem to move easier, but if you build your stock shocks buy the book, and take care to oil the bushing that goes in the collar, then it will be fine. no performance gain from useing the aluminum shocks just a hop up.

I agree, i have both and the alloy one's are no better than the standard plastic shocks.