This years Pinewood Derby car (Our Last)
Reply #7 –
We used split shot for fishing to try and get the weight right on the money. We would bore a cavity in the bottom of the car and glue in some weight to get it close. Then I would weigh it with the scale at the race and add enough weight to get it as close as possible without going over and put a piece of tape over the added weight to hold it in. We would make sure the wheels were snug enough on the axle to keep them from wobbling but still rotate freely. We used plenty of graphite on the axle too.