Other mistake: If Jill moved the hotrod back in the garage after it was filled with snow, why isn't there a clean spot where she sat in it to drive it.
Revealing mistake: When the hot rod is back in the garage covered in "snow" - look at the color of the car, along with the door when the door is open. There is plastic on the inside of the door (probably to get all of the snow off so quickly) and the color of the hot rod is a lighter shade of blue then normal.
Answer: In seasons 1 and 2, each Binford tool had a unique model number, but from season 3 onward, they were all numbered 6100 as a running gag.
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