Reply To: 2016 Q3 build challenge – derby cars Home › Forums › MOCs › Build challenges! › 2016 Q3 build challenge – derby cars › Reply To: 2016 Q3 build challenge – derby cars July 27, 2016 at 10:00 am #17160 Tom FrostParticipant Thanks, @solscud007, that is helpful; I don’t think I saw that studs-forward car. Did your test car run okay? My design uses a similar sized wheel part