Any projection that doesn't include Fleener in the first is already ahead of the others that do.
The Niners IMO are too smart to pick in a position at which we already have 3 very good players and is NOT a position of need. The viral Fleener-love on this site has assumed absurd proportions. Trade up for Fleener!!??
I really like the Silatolu pick. He would be a pefect complement to Iupati on the other side. A mean, don't-mess-with-me mauler to protect the inside. It would also complement the team's personality.
If not the right OLineman in the first (which I expect), then one of many mean-spirited DL/Pass-rusher who could disrupt the QB in the first. OL/DB in rd2/3.
WR (Streeter or similar) in a later round.
I would expect this to happen.