As a beginner I got a Nuc 5 and 4 frames in mid July decanted into two national brood boxes. It has been doing as it should through the last few months. Later in the season , late August a 7 day mite count indicated that action was required. So I placed 2 Apivar strips in brood nest for the prescribed 6 weeks with a scratch of the strips in the third week , this showed a really good observed mite drop. I fed until mid September when they stopped taking down syrup. My question is if wintering a double brood where the stores are on top , hefting the hive left and right it seems heavy , being inexperienced I have also placed a block of fondant (this is slowly being consumed) on a QE on top of the stores (with insulation on top of the fondant ) , to be belts and braces for winter. Been keeping an ear on the hive every week and the hive sounds seems pretty active. Apart from being super cautious does this all like seem overkill? Or is there anything else I should be doing?

Thanks from Jim