Ceracell feeder fit on FH

I got a ceracell feeder in prep for new nuc but it’s a wee bit bigger than the FH2 box. May just buy a flat hive lid vs messing w whittling it down to fit but my real question is will bees be able to access corner feeding ports if they don’t perfectly align w the FH brood box? Also reading mixed advice re inner lid above or below feeder.