The Platinum Revo's are pretty much the best "plastic" ones. For aluminum, use whatever Plentenburg has on his (
http://www.rc-monster.com/forum/showthread.php?t=15663)....I like the idea of the flextek arms - sounds like this guy has a nice set up already.
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES