Pinewood Derby Weight Jig (3/8 inch holes)

I wanted a jig for installing 3/8 weights.  There are options for one that locks into the axle for safe spacing without splitting the axle groove.  There is also a no axle option that can be slid anywhere.  This is designed for a standard, full width car.

NOTE:  This fits the official BSA block, it may not fit other similar blocks.