 Complete the following phrase:  As a constructor, BRP took part in 13 Grand Prix rounds, scoring a total of 11 championship points. After the team was forced to withdraw from F1 when BRP were denied membership of the Formula 1 Constructors Association which effectively deprived them of start money, then a significant factor in a teams income. Instead, BRP was hired by Masten Gregorys stepfather George Bryant to built two cars for the 