ImmenseMiniatures@kingmopar440 Generally, using a drill the same size as the wire will make a firm slip-fit. So for 1mm (.039 inch) wire use a 1mm or #60 drill. This video is for a different chassis, but the tube-clearing information applies.
ImmenseMiniatures To complete this chassis you will need:
1mm music wire (spring steel wire)
1mm drill and pin-vise
3/16 O.D. bushings or bearings for rear axle
3/32 axles front and rear
wheels, tires, gears.
slim-can type motor
wire and pickup braids