My kids will be racing on February 3rd. They usually do AWANA Grand Prix, but they're not having that at our church this year, so their friend invited them to the RA race at her church. This will be our first time at an RA race. The wheels seem wobbly, like the wheel bores were made too big for the axles. Is that normal? I'm told that they'll be using a wooden track with side rails instead of a center guide, which is also something new to us.