K&S Brand 3/32 Brass Tube
(3/32 is the Outside Tube Dimension)
K&S Part Number 1268
Available at your local Hobby Supply
Using Piece of 3/32 Brass Tube over the Pin and then adjusting
the position of a gear/boss assy on
the axle
Cut a piece of Brass Tube just longer than the Pin The Brass
tube keeps the Axle from slipping off the pin