We attended Winterfest at Sebring Raceway this past weekend. PBOC (Porsche BMW Owners Club) sanctioned the driver's ed, track sessions and club races at the 3.1 mile long race track. All of the club racing classes were in the same session, with our slow (in comparison to World Challenge-spec M3s) Cooper S running side-by-side with GT2 Porsches. Per qualified at …