So, a suggestion...
How about a longer servo mount? Many of us run the short servos, and longer mounts (much longer than the longest option in the kit) could give us the ability to push the shorter servo closer to the edge of the chassis. This would enable us to run the servo in the forward holes, giving us much-needed space for our electronics, and won't require you to take a live beaver to the corner of your servo to prevent the arm from rubbing. It also seems to still maintain decent alignment between the servo horn and arm on the steering assembly.
Also, in aluminum would be great.