Penguin R/C makes custom Micro RS4 carbon chassis if you ask them. I think the CAD Charge is $110 and then a charge for the chassis. The CAD can be saved and them the next cut of the same chassis will be lesser.
Anyways, someone should ask if Brian will cut the original Micro RS4 chassis in 100% carbon.
Main Chassis
Upper Mid Deck
Rear Upper Deck
Front Brace
Front Bumper Brace
And finally he offers great CF Motor Plates that I recommend, because it helps lower weight on the heavier side of the Micro RS4. And finally I think Brian should remake the CF Motor Plates to be completely Straight instead of the 1 screw hole on the bottom with the slide rotated upper adjustment. Like a M18 or 1/10 pro design. And make 3 types, (180 Flat Head Motor) (180 Round Motor) (280/300/370) in Carbon Fiber.
All that we need is a stock ABS Front Spur and Rear Carbon Shaft. Really.