quietnas, going all aluminum really doesn't change the weight too significantly from what I experienced, only by a couple of ounces. I actually checked it out with my 2 duratrax maximum STs as one is all aluminum, and the other is still mostly stock, and the weight difference is pretty minimal. making the decision is also dependent on whether you want a true "basher" that won't nuke off a bad jump or if you are going for a race ready vehicle. Another thing about aluminum is this, for every plastic part you replace with aluminum it tends to transfer the break point of the vehicle. I usually go almost all aluminum, and leave the pivot blocks/hinge plates as plastic or delrin, so the breakpoint is at the a very inex*****ve place to replace, and prevents me from getting a bent chassis or a arm, as those tend to be $$$ to replace. All told though, I like having at least a couple of all aluminums around for extreme jumping and launching, otherwise any race vehicles, I stay away from aluminum, as it is cheaper and easier in most cases to swap out an OEM part.