Lucky me; I had some approx. .020" thick small washers in my assortment pack of R/C car nuts and bolts, to use on Son's screamin' yellow Speedy.

.5mm / 25.4 = .019685"

(I was searching for washer thickness spec., figuring we'd have to make some, as he's picked up a slight midrange flat spot since he drilled the slides air hole.)

Thanks, Dale!

Is this a great board, or what!?