Central CR heating within r_c of the cool core in Fig. 7 as a function of the CRp streaming velocity. The CR streaming heating power decreases with decreasing streaming velocity. For α_st ~ 0.1 this trend is weakened by the build up of a centrally enhanced CRp population. For α_st ~ 1 the streaming velocity is so large, that the advective work on the CRp population is instantaneously dissipated, and the heat input is therefore independent of α_st in this regime. The build up of the central CR population with decreasing α_st can be seen in the Coulomb heating rate.