What other hobby...


has has an infinite number of variables like this one?
needlebrush
Maintaining a koi pond, keeping a 1980 Triumph TR8 on the road, and all things canine
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My first love, drag racing. Never the same conditions at the various tracks you go to. Constantly tuning for power and tuning for how much power the drag strip can handle on any given moment. Upgrades or reconfiguring of your race car to stay on top and beat the competition