i like the round 2 simple chassies with a few parts and seperate interior pans and metal axles they are more sturdier then round 2's plastic pegs i tend to look at the parts list on the back now befor i buy new round 2 car kits to see how the chassis and interior is the only 2 reasons why i have bought these 71 dusters is cause i wanted to build and add two to my plymouth shelve and cause the vintage ones or promos are to expensive and i bough another two to buld two other cars not dusters but i moded the one with a 75/76 dart chassis and interior pan or i used the ones from a 80 volare with the 71 duster front seats and dash and the recent one i am working on that caused me to make this post which is going to be a mexican 71 valiant superbee