I just love spending other peoples money....
I would add to that the Cut Motor Brushes as you will need them for the 250 hour maintenance and the $5.00 brushes when too short can snap that $40.00 cutting bit... The X Gear is good to have when you get a jam on a weekend... The Y Gear box gear is nice if you wait to replace the inner Y Gear Box Bearings and the shaft gets worn on the Y Gear. It is recommended to replace the 2 inner Y Gear Box Bearings at 250 Cut Hours when you change the Cut Motor Brushes.
And Sand Paper Belts if you use them.
Good Luck,
AL
Buy Locally or on line. http://www.avidrc.com/product/1/bear...-bearings.html