weight

For the first time ever, I have two grandsons racing in the same pack. So, I am trying to provide each with exactly the same quality of materials for their respective build. I found that if I gather 12 cubes for the 'behind rear axle' position, the groups had different weights. Checking...

I'm the new guy here with a Lion and Webelos cub scouts which both handily won their pack races. We are now onto the district event which is using the detailed Greater NYC rules for the stock class and I have to build new cars. The inserted picture is a 3 wheel rail runner that won our event...