By popular demand here is my suggestion of upgrade parts for the brand new Schumacher R/C Racing Mi9.

Highly recommended:
U8729 x2
U8780, U8779, U8781 (only for carpet racing) x1
U8570 x1
U7816 x1

Recommended:
U8335 x1 (when using shorty battery)
U8730 x2 (for asphalt racing)
U7866 x1
U8753 x1

Bling bling:
U8323 x1
U7839 x1
U8768 x1
U8776 x2
U8777 x2
U7829 x3
U7828 x1
Ti Mi9 screw set
U8772 x1
AX034 x1

For the ultra pros:
U8800 x1
U8770 x1