To resurrect a dead thread and help someone in the future:
Mike Pranka, the guy that does WT parts in the US, gave me some info.
For damping, the fluid is particular but not propriety-100,000cst silicon. You can buy it on amazon, usually packaged for RC cars. One of those size bottles is enough.
For the spindle, he said Mr. Firebaugh, the designer, has updated the fluid to be synthetic motor oil, 5w20 or 5w30, whichever is cheaper. he said viscosity is not that important.
Mike Pranka, the guy that does WT parts in the US, gave me some info.
For damping, the fluid is particular but not propriety-100,000cst silicon. You can buy it on amazon, usually packaged for RC cars. One of those size bottles is enough.
For the spindle, he said Mr. Firebaugh, the designer, has updated the fluid to be synthetic motor oil, 5w20 or 5w30, whichever is cheaper. he said viscosity is not that important.