Greetings Pro's. I have a question about center of gravity. We are getting ready for our Pack Race. We have been using a 3/4" in front of the back axles with the wheels installed for the last two years to great success. I have noticed watching videos and seeing photos and reading the blogs that it seems many of you are gaging your cog without the wheels. Which is best? Wheels on or off? Our Pack uses a Best Track, but the setup is different each year because different people set it up. Some years smooth, sometimes the joints are not flush. The District Track is a Piantedosi. Setup is pretty consistent, but there is definitely one slow lane and it is the same lane each year. My boys are shooting for a sweep in the Pack, One Tiger, One Bear & 1 Web 2 racing this year. Any help would be greatly appreciated. Here is my shameless plug for Glenn and John, My boys have won 6 Pack Division Championships, 3 Pack Championships, Two District Championships and a Third and 5th place in the District since finding "THE BLOCK" and using their wheel and axle prep system and prep supplies. We are preparing for similar success this year.