When you go to put the new bearings in the carrier, clean the carrier of all grease, then clean it Thoroughly in warm soapy water and dry it off. Put the new bearings in the freezer for a couple hours. Heat the oven up to 200ish and put the carrier in it. Warm it up for 20 mins or so, remove it and put a thin layer of anti seize on the places the bearings will seat.
Take the bearings out of the freezer and they should push in with minimal effort.