forget the aluminum and invest in some hooked on phonics. I know your from Canada (Aye?) but I'm pretty sure a majority of the people there speak english.
My take on aluminum parts are they are pretty, but are somewhat impractical (Except Skids, servo covers, tank covers stuff like that). Aluminum doesn't absorb the brunt like plastic does and instead of breaking a arm, you do alot more damage deeper in. Look into Rpm stuff. can't beat the no questions asked lifetime warranty.