Can someone link some nice essential material that focuses on this subject? I am overfolding to 3b's pre at times and need work on calling ranges. I'm even more comfortable with constructing 4b ranges than 3b calling ranges although this does seem somewhat common among other players.

At stakes like 10nl through 25nl - How much, if any, does rake play a role? I notice these players are quite weak playing the flop in 3b pots and see that this is where some huge value can come from at these stakes.