centre mags bearings having an effect on bearings,my fav set up is centre mag set up mainly because the knob dos,nt stick out as far and it dosnt come out when winding magnets off.
i hav converted quite a few reels centre mags and are imo just as good as mono mag if not better for reason above.
although centre mag knob the magnet or magnets inside side plate are offset same as mono mag.
ceramic bearings when i have been doing a bit lead hoying been using dry hybrid ceramics in all my reels no probs at all but i have been using multipliers all my life ,but in my opion most people prefer stainless bearings with oil in.
maybe if i chucked further the dry ceramics may be too loose for me i dont realy know.