I find weight is a large factor that most dont even account for...its Very important in truggy class...but seems to be lost in the transition to buggy....when i know i can drop 80g in a simple tire swap...i keep that in mind...also foam's...like PTP Racing said...he's used to the stiff foam of AKA where as i prefre the soft foam that panther has...in the end its all opinion's/driving style on what works and what doesn't.