It was just over 5 oz but low enough not to register over, cause that's how we roll. Placed it mostly in the back just in front of the rear wheels tucked inside the "frame". Wheel base was stretched by drilling new axle holes and a large portion of wood was cut from the middle with a basswood veneer providing the base and top.
My sons been racing in the family league three years now because of his older cousins but was never able to win a trophy. I had zero issues getting him to work on his car because he told me this year he wanted to win a trophy. He's got 2 now. He's about to get a dose of humble pie at council races though because we live in NASCAR country and you can buy ready made cars about 10-15mph faster than his. Even at district he was getting smoked by cars that clearly were not built in a work shed.