[RC-Monster Mike]

Indeed the cut-outs are for weight reduction, but also they look good and can add integrity when done correctly(physics...less is more sometimes). My V-Maxx chassis is within an ounce of the stock plastic chassis, but way stronger(and much sexier if I do say so myself). ;-)

Hinge-pin braces are currently incorporated and included into the FLM lower suspension arms(per my request several years ago). Your braces look like they may interfere with the servo saver/bellcrank assembly as they are shown in the pictures - we had to machine the arms slightly and counter bore the braces(for the e-clips) on the FLM arms to allow clearance for the bell cranks. The rear needs no mods(and has much less of a need for the brace to begin with - always bent the lower front hinge-pins).