Feed until they have drawn out the configuration you want them to winter in. IF that is 2 deeps or 3 mediums or whatever you had in mind.
Then put the supers on and let them work for you.
The colony needs only such amount of frames what it covers.
With feeding you stuck the brood area. To force them draw new combs more thatn they can cover it is nonsense.
If you have one box of bees, 2 frames of food stores are good. The rest 8 frames are for brood.
When the hive has half frame of food, feed again 5 kg sugar but not more.