Weekend mail call:Andrew from Quito, Ecuador wants to know if I can see the San Francisco 49ers occasionally using running back LaMichael James as a slot receiver.Bill Williamson: Maybe some. I know the 49ers want to get the 2012 second-round draft pick more involved in the offense. I think they would like to design more screens out of the backfield for him. James has big speed and it needs to be better exploited.Terry from Palo Alto, Ca. wants to know if I think Oregon State receiver Brandin Cooks is a fit for the 49ers.