Williams flipper jumper wires for most of their 60s and 70s games are too
small. The jumper wires are the wires between the end-of-stroke switch and
the flipper coil. They used 22 gauge wire when they should have used 18
gauge. Replace this wire and you will not only get a slight improvement in
your flippers, but you will also reduce future maintenance.
Tim Arnold pinGame journal, #25 September 1993 pp 37.