i have an older 98-99 stewart chassis .. the car won Sod championship in 2001 sod rookie of the year i think 2003 also i won i-96 track championship in 06.. car still seems to be a good car was built great.. from what i heard most of the newer 2000's cars were based on a maxim chassis with stewarts add ons.
the way i can tell chassis is a stewart is an X cross the back of the cage.. not sure if he did that with the newer cars or not..