Micro
I started out in Quarter Midgets 60 some odd years ago. On a 1/20 mile track Quarter Midgets are still the fastest thing out (as seen this last winter when they raced Midgets indoors on a Quarter Midget track) they are now getting down close to a 5 second lap. On a 1/5 or smaller track the sidewinder holds that same distinction, they just can't be beat including Out Law Karts.
When track size increases the bigger tires, wheelbase, and extra Horsepower starts to take over. A few years ago they tried out 1000cc sidewinders on the East Coast. They just did not work out too well Kind of like over kill.
I think stepping stone would not be a good way to describe the transition between sidewinder and D2 Midget or even a full Midget, it is just another step in your racing life. However when the track size starts getting past 1/4 mile it is a good time to think about getting into something else. From what I have read a D2 type car managed to finish in the top 5 up at Montpelier this last weekend, not too shabby.
They had one USAC car and 5 or 6 guys with D2 type cars that I guess chose not to come up with the membership fee. Keep in mind Montpelier is close to a 3/8th mile track.
If you are having fun more power to you>>>that is a lot better reason for racing than the one of making a lot of money doing it. My observation was that there are alternate ways to race that might be as much fun, a little less expensive and that don't offer you a 2 in 5 chance of racing for the BIG MONEY.

Racing B mains and watching A mains from the stands just ain't much fun when it is your hobby.
Honest Dad himself

