By Steve Okeefe - My jig blocks are set up a bit differently
than others I've seen. Instead of jig wheels and pins, which can be notoriously difficult
to locate properly, I have built adjustable brass anchor plates with steel axle tubes,
to position the rear axle and axle bearings solidly in all three dimensions,
while I build the chassis around them. The position of the plates can be adjusted
to tolerances of two or three thousandths of an inch.
The lines scribed on the
block run parallel and perpendicular to the centerline of the rear axle, and
include the chassis centerline, overall chassis width, standard wheelbase and
standard guide lead. This block is currently set up to build inline 1/32 scale
sports car chassis two and one half inches wide.