I have ordered a 1/8" diameter 2-flute 60 degree carbide end mill. My plan is to shorten it to .33" then press on an end I designed and 3D printed. See photos. $11.18 (and $8.50 shipping). If it works the printed end's length could be modified for different trucks if needed.
At least, that's my plan.
I'll let the group know how it works out.
With cinders in your eyes, Bruce Bowie 419-602-3584 in2trains@...