A big part will have to deal with timing. If Render takes over the C spot in '18 ... then we're looking at another new C in '19. Guys who have received work at C include Banwart, Williams, and Duwa. By '19, the former two will be JRs, Duwa will be a SO, and Linderbaum will be a RS FR. It's very rare for a FR to take over at C ... so if Duwa is in the line of succession ... then I'd be inclined to believe that Render may be in serious consideration for the gig. If Williams or Banwart are going to take over the job ASAP ... then that opens up the door for a guy to take over the spot in 2021. In this case, it's likely too late for Duwa to take the job ... so somebody like Linderbaum could be a good candidate.