Sneak Peek – JConcepts New Profiled Closed Cell Inserts By Rich MAugust 20, 2010At the Track, New Products Here is a photo taken at the ROAR Electric Off-road Nationals of JConcepts new Profiled Closed Cell Inserts. More details to follow. Pictured are 1/10th buggy rear, 1/10th 4wd front and SCT profiled insert.