I think it's the tight ones that you want to buy [if you are lucky] and just figure that you will need to spend time to get it just right. It's tough to determine what is "just right" if you aren't very experienced, if if you don't have a "GO - NO GO" method to know when to stop honing.
I have had success with using a steel handle fitted to the piston [using the piston as the honing tool] and fine sink scrub powder mixed with oil as the abrasive.
Fox used to sell a powder called Lustrox to dump into the old iron engines to polish them while they were more or less broken in. It might have done some magic microscopically to fill the pores. I don't know what the ABC or AAC equivalent of that process is.