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They also make good victory counters -- use the chicken for bird hits and the cow for furry critter hits and line them up on your fuselage like a fighter ace.
That's why I like the 194, it has a bridge rectifier built in so the polarity doesn't matter it just rectifies whatever it gets, you can do the same with a pair of diodes with one lamp wire to chassis. For your type of dash the lamps glue in place of the crappy rubber holder,Your fix is fine ;-T